diff --git a/Valour/Client/Components/PlanetsList/PlanetListItemComponents.razor b/Valour/Client/Components/PlanetsList/PlanetListItemComponents.razor
new file mode 100644
index 000000000..a82b4049b
--- /dev/null
+++ b/Valour/Client/Components/PlanetsList/PlanetListItemComponents.razor
@@ -0,0 +1,23 @@
+@code {
+    
+    public static RenderFragment PlanetContent =>
+        @<div style="border: 1px solid black">
+            Planet
+        </div>;
+    
+    public static RenderFragment CategoryContent =>
+        @<div style="border: 1px solid black">
+            Category
+        </div>;
+        
+    public static RenderFragment ChatChannelContent =>
+        @<div style="border: 1px solid black">
+            Chat Channel
+        </div>;
+    
+    public static RenderFragment VoiceChannelContent =>
+        @<div style="border: 1px solid black">
+            Voice Channel
+        </div>;
+
+}
\ No newline at end of file
diff --git a/Valour/Client/Components/PlanetsList/PlanetListItems.cs b/Valour/Client/Components/PlanetsList/PlanetListItems.cs
new file mode 100644
index 000000000..1612ee6ae
--- /dev/null
+++ b/Valour/Client/Components/PlanetsList/PlanetListItems.cs
@@ -0,0 +1,31 @@
+using Valour.Client.Components.Utility.DragList;
+using Valour.Sdk.Models;
+using Valour.Shared.Models;
+
+namespace Valour.Client.Components.PlanetsList;
+
+public class PlanetListItem : DragListItem
+{
+    public Planet Planet { get; set; }
+
+    public override uint Depth => 0u;
+    public override uint Position => Planet.Name.FirstOrDefault();
+
+    public PlanetListItem(Planet planet)
+    {
+        Planet = planet;
+    }
+}
+
+public class ChannelListItem : DragListItem
+{
+    public Channel Channel { get; set; }
+    
+    public override uint Depth => Channel.Position.Depth;
+    public override uint Position => Channel.RawPosition;
+    
+    public ChannelListItem(Channel channel)
+    {
+        Channel = channel;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Client/Components/Utility/DragList/DragListComponent.razor b/Valour/Client/Components/Utility/DragList/DragListComponent.razor
new file mode 100644
index 000000000..4d094c82b
--- /dev/null
+++ b/Valour/Client/Components/Utility/DragList/DragListComponent.razor
@@ -0,0 +1,63 @@
+@inherits ControlledRenderComponentBase
+
+@{
+    if (_items is null)
+    {
+        return;
+    }
+    
+    foreach (var item in _items)
+    {
+        <Virtualize Items="@_items" ItemSize="@ItemHeight">
+            <div style="height: @ItemHeight; max-height: @ItemHeight; margin-left: @(NestingMargin * @item.Depth)px">
+                @item.Content
+            </div>
+        </Virtualize>
+
+    }
+}
+
+@code {
+
+    [Parameter] 
+    public float NestingMargin { get; set; } = 8f;
+
+    [Parameter] 
+    public float ItemHeight { get; set; } = 24f;
+    
+    // all items, sorted for render
+    private List<DragListItem> _items = new();
+
+    /// <summary>
+    /// Sets the items of this drag list. Note that changes to the list will
+    /// pass down (stored by reference) but you must manually trigger rebuilds.
+    /// </summary>
+    public void SetTopLevelItems(List<DragListItem> items)
+    {
+        _items = items;
+    }
+    
+    /// <summary>
+    /// Orders, 
+    /// </summary>
+    public void Rebuild(bool render = true)
+    {
+        OrderItems();
+        
+        if (render)
+        {
+            ReRender();
+        }
+    }
+    
+    // Orders the items for display
+    private void OrderItems()
+    {
+        if (_items is null || _items.Count == 0)
+        {
+            return;
+        }
+        
+        _items.Sort(DragListItem.Compare);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Client/Components/Utility/DragList/DragListItem.cs b/Valour/Client/Components/Utility/DragList/DragListItem.cs
new file mode 100644
index 000000000..3acdd7f64
--- /dev/null
+++ b/Valour/Client/Components/Utility/DragList/DragListItem.cs
@@ -0,0 +1,55 @@
+using Microsoft.AspNetCore.Components;
+
+namespace Valour.Client.Components.Utility.DragList;
+
+public abstract class DragListItem
+{
+    /// <summary>
+    /// The drag list this item belongs to
+    /// </summary>
+    public DragListComponent DragList { get; set; }
+    
+    /// <summary>
+    /// True if this item can contain other items
+    /// </summary>
+    public bool Container { get; set; }
+    
+    /// <summary>
+    /// True if this item is opened. Only applies to containers.
+    /// </summary>
+    public bool Open { get; set; }
+
+    /// <summary>
+    /// The amount of margin to apply to children. Only applies to containers.
+    /// </summary>
+    public int ChildMargin { get; set; }
+    
+    public abstract uint Depth { get; }
+
+    public abstract uint Position { get; }
+    
+    public virtual Task OnClick()
+    {
+        if (Container)
+        {
+            // Switch the open state
+            Open = !Open;
+            
+            // Re-render drag list
+            DragList.ReRender();
+        }
+
+        return Task.CompletedTask;
+    }
+    
+    /// <summary>
+    /// The content to render for this item
+    /// </summary>
+    public RenderFragment Content { get; set; }
+    
+    public static int Compare(DragListItem a, DragListItem b)
+    {
+        // Compare position
+        return a.Position.CompareTo(b.Position);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Client/Utility/ModelQueryEngineExtensions.cs b/Valour/Client/Utility/ModelQueryEngineExtensions.cs
new file mode 100644
index 000000000..9ec6ca88f
--- /dev/null
+++ b/Valour/Client/Utility/ModelQueryEngineExtensions.cs
@@ -0,0 +1,14 @@
+using Microsoft.AspNetCore.Components.Web.Virtualization;
+using Valour.Sdk.ModelLogic;
+
+namespace Valour.Client.Utility;
+
+public static class ModelQueryEngineExtensions
+{
+    public static async ValueTask<ItemsProviderResult<TModel>> GetVirtualizedItemsAsync<TModel>(this ModelQueryEngine<TModel> engine, ItemsProviderRequest request)
+        where TModel : ClientModel<TModel>
+    {
+        var queryData = await engine.GetItemsAsync(request.StartIndex, request.Count);
+        return new ItemsProviderResult<TModel>(queryData.Items, queryData.TotalCount);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Client/wwwroot/js/dayjs.min.js b/Valour/Client/wwwroot/js/dayjs.min.js
new file mode 100644
index 000000000..61916d882
--- /dev/null
+++ b/Valour/Client/wwwroot/js/dayjs.min.js
@@ -0,0 +1 @@
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).dayjs=e()}(this,(function(){"use strict";var t=1e3,e=6e4,n=36e5,r="millisecond",i="second",s="minute",u="hour",a="day",o="week",c="month",f="quarter",h="year",d="date",l="Invalid Date",$=/^(\d{4})[-/]?(\d{1,2})?[-/]?(\d{0,2})[Tt\s]*(\d{1,2})?:?(\d{1,2})?:?(\d{1,2})?[.:]?(\d+)?$/,y=/\[([^\]]+)]|Y{1,4}|M{1,4}|D{1,2}|d{1,4}|H{1,2}|h{1,2}|a|A|m{1,2}|s{1,2}|Z{1,2}|SSS/g,M={name:"en",weekdays:"Sunday_Monday_Tuesday_Wednesday_Thursday_Friday_Saturday".split("_"),months:"January_February_March_April_May_June_July_August_September_October_November_December".split("_"),ordinal:function(t){var e=["th","st","nd","rd"],n=t%100;return"["+t+(e[(n-20)%10]||e[n]||e[0])+"]"}},m=function(t,e,n){var r=String(t);return!r||r.length>=e?t:""+Array(e+1-r.length).join(n)+t},v={s:m,z:function(t){var e=-t.utcOffset(),n=Math.abs(e),r=Math.floor(n/60),i=n%60;return(e<=0?"+":"-")+m(r,2,"0")+":"+m(i,2,"0")},m:function t(e,n){if(e.date()<n.date())return-t(n,e);var r=12*(n.year()-e.year())+(n.month()-e.month()),i=e.clone().add(r,c),s=n-i<0,u=e.clone().add(r+(s?-1:1),c);return+(-(r+(n-i)/(s?i-u:u-i))||0)},a:function(t){return t<0?Math.ceil(t)||0:Math.floor(t)},p:function(t){return{M:c,y:h,w:o,d:a,D:d,h:u,m:s,s:i,ms:r,Q:f}[t]||String(t||"").toLowerCase().replace(/s$/,"")},u:function(t){return void 0===t}},g="en",D={};D[g]=M;var p="$isDayjsObject",S=function(t){return t instanceof _||!(!t||!t[p])},w=function t(e,n,r){var i;if(!e)return g;if("string"==typeof e){var s=e.toLowerCase();D[s]&&(i=s),n&&(D[s]=n,i=s);var u=e.split("-");if(!i&&u.length>1)return t(u[0])}else{var a=e.name;D[a]=e,i=a}return!r&&i&&(g=i),i||!r&&g},O=function(t,e){if(S(t))return t.clone();var n="object"==typeof e?e:{};return n.date=t,n.args=arguments,new _(n)},b=v;b.l=w,b.i=S,b.w=function(t,e){return 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\ No newline at end of file
diff --git a/Valour/Client/wwwroot/js/dayjs.timezones.min.js b/Valour/Client/wwwroot/js/dayjs.timezones.min.js
new file mode 100644
index 000000000..280a2bf47
--- /dev/null
+++ b/Valour/Client/wwwroot/js/dayjs.timezones.min.js
@@ -0,0 +1 @@
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).dayjs_plugin_timezone=e()}(this,(function(){"use strict";var t={year:0,month:1,day:2,hour:3,minute:4,second:5},e={};return function(n,i,o){var r,a=function(t,n,i){void 0===i&&(i={});var o=new Date(t),r=function(t,n){void 0===n&&(n={});var i=n.timeZoneName||"short",o=t+"|"+i,r=e[o];return r||(r=new Intl.DateTimeFormat("en-US",{hour12:!1,timeZone:t,year:"numeric",month:"2-digit",day:"2-digit",hour:"2-digit",minute:"2-digit",second:"2-digit",timeZoneName:i}),e[o]=r),r}(n,i);return r.formatToParts(o)},u=function(e,n){for(var i=a(e,n),r=[],u=0;u<i.length;u+=1){var f=i[u],s=f.type,m=f.value,c=t[s];c>=0&&(r[c]=parseInt(m,10))}var d=r[3],l=24===d?0:d,h=r[0]+"-"+r[1]+"-"+r[2]+" "+l+":"+r[4]+":"+r[5]+":000",v=+e;return(o.utc(h).valueOf()-(v-=v%1e3))/6e4},f=i.prototype;f.tz=function(t,e){void 0===t&&(t=r);var n,i=this.utcOffset(),a=this.toDate(),u=a.toLocaleString("en-US",{timeZone:t}),f=Math.round((a-new Date(u))/1e3/60),s=15*-Math.round(a.getTimezoneOffset()/15)-f;if(!Number(s))n=this.utcOffset(0,e);else if(n=o(u,{locale:this.$L}).$set("millisecond",this.$ms).utcOffset(s,!0),e){var m=n.utcOffset();n=n.add(i-m,"minute")}return n.$x.$timezone=t,n},f.offsetName=function(t){var e=this.$x.$timezone||o.tz.guess(),n=a(this.valueOf(),e,{timeZoneName:t}).find((function(t){return"timezonename"===t.type.toLowerCase()}));return n&&n.value};var s=f.startOf;f.startOf=function(t,e){if(!this.$x||!this.$x.$timezone)return s.call(this,t,e);var n=o(this.format("YYYY-MM-DD HH:mm:ss:SSS"),{locale:this.$L});return s.call(n,t,e).tz(this.$x.$timezone,!0)},o.tz=function(t,e,n){var i=n&&e,a=n||e||r,f=u(+o(),a);if("string"!=typeof t)return o(t).tz(a);var s=function(t,e,n){var i=t-60*e*1e3,o=u(i,n);if(e===o)return[i,e];var r=u(i-=60*(o-e)*1e3,n);return o===r?[i,o]:[t-60*Math.min(o,r)*1e3,Math.max(o,r)]}(o.utc(t,i).valueOf(),f,a),m=s[0],c=s[1],d=o(m).utcOffset(c);return d.$x.$timezone=a,d},o.tz.guess=function(){return Intl.DateTimeFormat().resolvedOptions().timeZone},o.tz.setDefault=function(t){r=t}}}));
\ No newline at end of file
diff --git a/Valour/Client/wwwroot/js/jquery-3.7.1.min.js b/Valour/Client/wwwroot/js/jquery-3.7.1.min.js
new file mode 100644
index 000000000..8197e838e
--- /dev/null
+++ b/Valour/Client/wwwroot/js/jquery-3.7.1.min.js
@@ -0,0 +1,2 @@
+/*! jQuery v3.7.1 | (c) OpenJS Foundation and other contributors | jquery.org/license */
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\ No newline at end of file
diff --git a/Valour/Client/wwwroot/js/twemoji.min.js b/Valour/Client/wwwroot/js/twemoji.min.js
new file mode 100644
index 000000000..a37dee5e5
--- /dev/null
+++ b/Valour/Client/wwwroot/js/twemoji.min.js
@@ -0,0 +1,2 @@
+/*! Copyright Twitter Inc. and other contributors. Licensed under MIT */
+var twemoji=function(){"use strict";var twemoji={base:"https://twemoji.maxcdn.com/v/14.0.2/",ext:".png",size:"72x72",className:"emoji",convert:{fromCodePoint:fromCodePoint,toCodePoint:toCodePoint},onerror:function 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twemoji;function createText(text,clean){return document.createTextNode(clean?text.replace(UFE0Fg,""):text)}function escapeHTML(s){return s.replace(rescaper,replacer)}function defaultImageSrcGenerator(icon,options){return"".concat(options.base,options.size,"/",icon,options.ext)}function grabAllTextNodes(node,allText){var childNodes=node.childNodes,length=childNodes.length,subnode,nodeType;while(length--){subnode=childNodes[length];nodeType=subnode.nodeType;if(nodeType===3){allText.push(subnode)}else if(nodeType===1&&!("ownerSVGElement"in subnode)&&!shouldntBeParsed.test(subnode.nodeName.toLowerCase())){grabAllTextNodes(subnode,allText)}}return allText}function grabTheRightIcon(rawText){return toCodePoint(rawText.indexOf(U200D)<0?rawText.replace(UFE0Fg,""):rawText)}function parseNode(node,options){var 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\ No newline at end of file
diff --git a/Valour/Client/wwwroot/media/logo/logo-128.webp b/Valour/Client/wwwroot/media/logo/logo-128.webp
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diff --git a/Valour/Client/wwwroot/media/logo/logo-256.webp b/Valour/Client/wwwroot/media/logo/logo-256.webp
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diff --git a/Valour/Client/wwwroot/media/logo/logo-512.webp b/Valour/Client/wwwroot/media/logo/logo-512.webp
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diff --git a/Valour/Client/wwwroot/media/logo/logo-64.webp b/Valour/Client/wwwroot/media/logo/logo-64.webp
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diff --git a/Valour/Client/wwwroot/media/user-icons/icon-0.webp b/Valour/Client/wwwroot/media/user-icons/icon-0.webp
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diff --git a/Valour/Client/wwwroot/media/user-icons/icon-1.webp b/Valour/Client/wwwroot/media/user-icons/icon-1.webp
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diff --git a/Valour/Client/wwwroot/media/user-icons/icon-2.webp b/Valour/Client/wwwroot/media/user-icons/icon-2.webp
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diff --git a/Valour/Client/wwwroot/media/user-icons/icon-3.webp b/Valour/Client/wwwroot/media/user-icons/icon-3.webp
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diff --git a/Valour/Client/wwwroot/media/user-icons/icon-4.webp b/Valour/Client/wwwroot/media/user-icons/icon-4.webp
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diff --git a/Valour/Client/wwwroot/media/user-icons/icon-5.webp b/Valour/Client/wwwroot/media/user-icons/icon-5.webp
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diff --git a/Valour/Database/Extensions/ChannelExtensions.cs b/Valour/Database/Extensions/ChannelExtensions.cs
new file mode 100644
index 000000000..413b9dc2b
--- /dev/null
+++ b/Valour/Database/Extensions/ChannelExtensions.cs
@@ -0,0 +1,63 @@
+using System.Runtime.CompilerServices;
+using Valour.Shared.Models;
+
+namespace Valour.Database.Extensions;
+
+public static class ChannelExtensions
+{
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static IQueryable<Channel> InPlanet(this IQueryable<Channel> channels, long? planetId)
+    {
+        return channels.Where(x => x.PlanetId == planetId);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static IQueryable<Channel> InParent(this IQueryable<Channel> channels, long? parentId)
+    {
+        return channels.Where(x => x.ParentId == parentId);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static IQueryable<Channel> DirectChildrenOf(this IQueryable<Channel> channels, ISharedChannel channel)
+    {
+        return DirectChildrenOf(channels, channel.PlanetId, channel.RawPosition);
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static IQueryable<Channel> DirectChildrenOf(this IQueryable<Channel> channels, long? planetId, uint position)
+    {
+        // In this case we return nothing
+        if (planetId is null)
+            return channels.Where(x => false);
+        
+        var depth = ChannelPosition.GetDepth(position);
+        var bounds = ChannelPosition.GetDescendentBounds(position, depth);
+        var directChildMask = ChannelPosition.GetDirectChildMaskByDepth(depth);
+        
+        return channels.Where(x => 
+            x.PlanetId == planetId && 
+            x.RawPosition >= bounds.lower && 
+            x.RawPosition < bounds.upper && 
+            (x.RawPosition & directChildMask) == position);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static IQueryable<Channel> DescendantsOf(this IQueryable<Channel> channels, ISharedChannel channel)
+    {
+        return DescendantsOf(channels, channel.PlanetId, channel.RawPosition);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static IQueryable<Channel> DescendantsOf(this IQueryable<Channel> channels, long? planetId, uint position)
+    {
+        // In this case we return nothing
+        if (planetId is null)
+            return channels.Where(x => false);
+        
+        var bounds = ChannelPosition.GetDescendentBounds(position);
+        return channels.Where(x =>
+            x.PlanetId == planetId &&
+            x.RawPosition >= bounds.lower && 
+            x.RawPosition < bounds.upper);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Client/ModelCache.cs b/Valour/Sdk/Client/ModelCache.cs
new file mode 100644
index 000000000..1ef397fe2
--- /dev/null
+++ b/Valour/Sdk/Client/ModelCache.cs
@@ -0,0 +1,83 @@
+using System.Collections.Concurrent;
+using Valour.Sdk.ModelLogic;
+using Valour.Sdk.Services;
+
+namespace Valour.Sdk.Client;
+
+/*  Valour (TM) - A free and secure chat client
+*  Copyright (C) 2024 Valour Software LLC
+*  This program is subject to the GNU Affero General Public license
+*  A copy of the license should be included - if not, see <http://www.gnu.org/licenses/>
+*/
+
+public class ModelCache<TModel, TId> 
+    where TModel : ClientModel<TModel, TId>
+    where TId : IEquatable<TId>
+{
+    private readonly ConcurrentDictionary<TId, TModel> _innerCache = new();
+    
+    /// <summary>
+    /// Places an item into the cache. Returns if the item already exists and should be updated.
+    /// </summary>
+    public TModel Put(TId id, TModel model)
+    {
+        // Empty object is ignored
+        if (model is null)
+            return null;
+
+        if (!_innerCache.TryAdd(id, model)) // Fails if already exists
+        {
+            return _innerCache[id];
+        }
+
+        return null;
+    }
+    
+    /// <summary>
+    /// Places an item into the cache, and replaces the item if it already exists
+    /// </summary>
+    public void PutReplace(TId id, TModel model)
+    {
+        _innerCache[id] = model;
+    }
+
+    /// <summary>
+    /// Returns true if the cache contains the item
+    /// </summary>
+    public bool Contains(TId id)
+    {
+        return _innerCache.ContainsKey(id);
+    }
+
+    /// <summary>
+    /// Returns all the items of the given type. You can use Linq functions like .Where on this function.
+    /// </summary>
+    public IEnumerable<TModel> GetAll()
+    {
+        return _innerCache.Values;
+    }
+
+
+    /// <summary>
+    /// Returns the item for the given id, or null if it does not exist
+    /// </summary>
+    public bool TryGet(TId id, out TModel model)
+    {
+        return _innerCache.TryGetValue(id, out model);
+    }
+
+    /// <summary>
+    /// Removes an item if present in the cache
+    /// </summary>
+    public void Remove(TId id)
+    {
+        _innerCache.TryRemove(id, out var _);
+    }
+    
+    public TModel TakeAndRemove(TId id)
+    {
+        _innerCache.TryRemove(id, out var model);
+        return model;
+    }
+}
+
diff --git a/Valour/Sdk/ModelLogic/ClientModel.cs b/Valour/Sdk/ModelLogic/ClientModel.cs
new file mode 100644
index 000000000..355775d9b
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ClientModel.cs
@@ -0,0 +1,138 @@
+using System.Text.Json.Serialization;
+using Valour.Sdk.Client;
+using Valour.Sdk.Nodes;
+using Valour.Shared;
+using Valour.Shared.Models;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.ModelLogic;
+
+public abstract class ClientModel
+{
+    [JsonIgnore]
+    public virtual string BaseRoute => $"api/{GetType().Name}";
+    
+    /// <summary>
+    /// Ran when this item is deleted
+    /// </summary>
+    public HybridEvent Deleted;
+
+    /// <summary>
+    /// Custom logic on model deletion
+    /// </summary>
+    protected virtual void OnDeleted() { }
+    
+    /// <summary>
+    /// The Valour Client this model belongs to
+    /// </summary>
+    public ValourClient Client { get; private set; }
+
+    /// <summary>
+    /// The node this model belongs to
+    /// </summary>
+    public virtual Node Node => Client?.PrimaryNode;
+
+    /// <summary>
+    /// Safely invokes the deleted event
+    /// </summary>
+    public void InvokeDeletedEvent()
+    {
+        OnDeleted();
+        Deleted?.Invoke();
+    }
+    
+    /// <summary>
+    /// Sets the client which owns this model
+    /// </summary>
+    public void SetClient(ValourClient client)
+    {
+        Client = client;
+    }
+}
+
+public abstract class ClientModel<TSelf> : ClientModel
+    where TSelf : ClientModel<TSelf>
+{
+    
+    /// <summary>
+    /// Ran when this item is updated
+    /// </summary>
+    public HybridEvent<ModelUpdateEvent<TSelf>> Updated;
+
+    /// <summary>
+    /// Custom logic on model update
+    /// </summary>
+    protected virtual void OnUpdated(ModelUpdateEvent<TSelf> eventData) { }
+    
+    /// <summary>
+    /// Adds this item to the cache. If a copy already exists, it is returned to be updated.
+    /// </summary>
+    public abstract TSelf AddToCacheOrReturnExisting();
+
+    /// <summary>
+    /// Returns and removes this item from the cache.
+    /// </summary>
+    public abstract TSelf TakeAndRemoveFromCache();
+    
+    public virtual void SyncSubModels(bool skipEvent = false, int flags = 0) { }
+
+    /// <summary>
+    /// Safely invokes the updated event
+    /// </summary>
+    public void InvokeUpdatedEvent(ModelUpdateEvent<TSelf> eventData)
+    {
+        OnUpdated(eventData);
+        Updated?.Invoke(eventData);
+    }
+}
+
+/// <summary>
+/// A live model is a model that is updated in real time
+/// </summary>
+public abstract class ClientModel<TSelf, TId> : ClientModel<TSelf>, ISharedModel<TId>
+    where TSelf : ClientModel<TSelf, TId> // curiously recurring template pattern
+    where TId : IEquatable<TId>
+{
+    public TId Id { get; set; }
+    
+    [JsonIgnore]
+    public virtual string IdRoute => $"{BaseRoute}/{Id}";
+    
+    /// <summary>
+    /// Attempts to create this item on the server
+    /// </summary>
+    /// <returns>The result, with the created item (if successful)</returns>
+    public virtual Task<TaskResult<TSelf>> CreateAsync()
+    {
+        if (!Id.Equals(default))
+            throw new Exception("Trying to create a model with an ID already assigned. Has it already been created?");
+            
+        return Node.PostAsyncWithResponse<TSelf>(BaseRoute, this);
+    }
+
+
+    /// <summary>
+    /// Attempts to update this item on the server
+    /// </summary>
+    /// <returns>The result, with the updated item (if successful)</returns>
+    public virtual Task<TaskResult<TSelf>> UpdateAsync()
+    {
+        if (Id.Equals(default))
+            throw new Exception("Trying to update a model with no ID assigned. Has it been created?");
+        
+        return Node.PutAsyncWithResponse<TSelf>(IdRoute, this);
+    }
+
+    /// <summary>
+    /// Attempts to delete this item on the server
+    /// </summary>
+    /// <returns>The result</returns>
+    public virtual Task<TaskResult> DeleteAsync()
+    {
+        if (Id.Equals(default))
+            throw new Exception("Trying to delete a model with no ID assigned. Does it exist?");
+        
+        return Node.DeleteAsync(IdRoute);
+    }
+}
+
diff --git a/Valour/Sdk/ModelLogic/ClientPlanetModel.cs b/Valour/Sdk/ModelLogic/ClientPlanetModel.cs
new file mode 100644
index 000000000..c4f24692b
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ClientPlanetModel.cs
@@ -0,0 +1,53 @@
+using Valour.Sdk.ModelLogic.Exceptions;
+using Valour.Sdk.Nodes;
+
+namespace Valour.Sdk.ModelLogic;
+
+public abstract class ClientPlanetModel<TSelf, TId> : ClientModel<TSelf, TId>
+    where TSelf : ClientPlanetModel<TSelf, TId>
+    where TId : IEquatable<TId>
+{
+    private Planet _planet;    
+    protected abstract long? GetPlanetId();
+
+    /// <summary>
+    /// The Planet this model belongs to.
+    /// The Planet should always be in cache before Planet Models are grabbed.
+    /// If for some reason planet is null, it will be fetched from the cache.
+    /// If it is not in cache, you should have loaded the planet first.
+    /// </summary>
+    public Planet Planet
+    {
+        get
+        {
+            if (_planet is not null) // If the planet is already stored, return it
+                return _planet;
+            
+            var planetId = GetPlanetId(); // Get the planet id from the model
+            if (planetId is null || planetId == -1) // If the id is null or -1, the model is not associated with a planet
+                return null;
+            
+            Client.Cache.Planets.TryGet(planetId.Value, out _planet); // Try to assign from cache
+            if (_planet is null) // If it wasn't in cache, throw an exception. Should have loaded the planet first.
+                throw new PlanetNotLoadedException(planetId.Value, this);
+            
+            // Return the planet
+            return _planet;
+        }
+    }
+
+    public override Node Node
+    {
+        get
+        {
+            var planetId = GetPlanetId();
+            
+            if (planetId is null || planetId == -1)
+                return Client.PrimaryNode;
+            
+            return Client.NodeService.GetKnownByPlanet(planetId.Value);
+        }
+    }
+}
+
+
diff --git a/Valour/Sdk/ModelLogic/Exceptions/PlanetNotLoadedException.cs b/Valour/Sdk/ModelLogic/Exceptions/PlanetNotLoadedException.cs
new file mode 100644
index 000000000..29727d208
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/Exceptions/PlanetNotLoadedException.cs
@@ -0,0 +1,11 @@
+using Valour.Shared.Models;
+
+namespace Valour.Sdk.ModelLogic.Exceptions;
+
+public class PlanetNotLoadedException : Exception
+{
+    public PlanetNotLoadedException(long planetId, ISharedModel requestedBy)
+        : base($"Tried to access planet {planetId} but it was not loaded. Requested by {requestedBy.GetType()}")
+    {
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/ModelLogic/ISortableModel.cs b/Valour/Sdk/ModelLogic/ISortableModel.cs
new file mode 100644
index 000000000..2a679f1f8
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ISortableModel.cs
@@ -0,0 +1,14 @@
+using Valour.Shared.Models;
+
+namespace Valour.Sdk.ModelLogic;
+
+public interface ISortableModel<TModel> : ISortable
+    where TModel : ClientModel<TModel>
+{
+}
+
+public interface ISortableModel<TModel, TId> : ISortable
+    where TModel : ClientModel<TModel, TId>
+    where TId : IEquatable<TId>
+{
+}
\ No newline at end of file
diff --git a/Valour/Sdk/ModelLogic/IVoiceChannel.cs b/Valour/Sdk/ModelLogic/IVoiceChannel.cs
new file mode 100644
index 000000000..70fb9c08c
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/IVoiceChannel.cs
@@ -0,0 +1,5 @@
+namespace Valour.Sdk.ModelLogic;
+
+public interface IVoiceChannel
+{
+}
diff --git a/Valour/Sdk/ModelLogic/ModelExtensions.cs b/Valour/Sdk/ModelLogic/ModelExtensions.cs
new file mode 100644
index 000000000..603c411e8
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ModelExtensions.cs
@@ -0,0 +1,24 @@
+using Valour.Sdk.Services;
+
+namespace Valour.Sdk.ModelLogic;
+
+public static class ModelExtensions
+{
+    /// <summary>
+    /// Syncs all items in the list to the cache and updates
+    /// references in the list.
+    /// </summary>
+    public static List<T> SyncAll<T>(this List<T> list, CacheService cache)
+        where T : ClientModel<T>
+    {
+        if (list is null || list.Count == 0)
+            return null;
+        
+        for (int i = 0; i < list.Count; i++)
+        {
+            list[i] = cache.Sync(list[i]);
+        }
+        
+        return list;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/ModelLogic/ModelList.cs b/Valour/Sdk/ModelLogic/ModelList.cs
new file mode 100644
index 000000000..36815d379
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ModelList.cs
@@ -0,0 +1,250 @@
+using System.Collections;
+using System.Runtime.CompilerServices;
+using Valour.Shared.Models;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.ModelLogic;
+
+public enum ListChangeType
+{
+    Added,
+    Updated,
+    Removed,
+    Set,
+    Cleared,
+    Reordered
+}
+
+public readonly struct ModelListChangeEvent<T>
+    where T : class
+{
+    public static readonly ModelListChangeEvent<T> Set = new(ListChangeType.Set, default);
+    public static readonly ModelListChangeEvent<T> Clear = new(ListChangeType.Cleared, default);
+    public static readonly ModelListChangeEvent<T> Reordered = new(ListChangeType.Reordered, default);
+    
+    public readonly ListChangeType ChangeType;
+    public readonly T Model;
+    
+    public ModelListChangeEvent(ListChangeType changeType, T model)
+    {
+        ChangeType = changeType;
+        Model = model;
+    }
+}
+
+/// <summary>
+/// Reactive lists are lists that can be observed for changes.
+/// </summary>
+public class ModelList<TModel, TId> : IEnumerable<TModel>, IDisposable
+    where TModel : ClientModel<TModel, TId>
+    where TId : IEquatable<TId>
+{
+    public HybridEvent<ModelListChangeEvent<TModel>> Changed; // We don't assign because += and -= will do it
+    
+    protected readonly List<TModel> List;
+    protected Dictionary<TId, TModel> IdMap;
+    public IReadOnlyList<TModel> Values;
+    
+    public int Count => List.Count;
+    
+    public ModelList(List<TModel> startingList = null)
+    {
+        List = startingList ?? new List<TModel>();
+        IdMap = List.ToDictionary(x => x.Id);
+        Values = List;
+    }
+    
+    // Make iterable
+    public TModel this[int index] => List[index];
+    public IEnumerator<TModel> GetEnumerator() => List.GetEnumerator();
+    IEnumerator IEnumerable.GetEnumerator() => List.GetEnumerator();
+
+    public virtual void Upsert(TModel item, bool skipEvent = false)
+    {  
+        ListChangeType changeType;
+        
+        if (!List.Contains(item))
+        {
+            List.Add(item);
+            changeType = ListChangeType.Added;
+        }
+        else
+        {
+            changeType = ListChangeType.Updated;
+        }
+        
+        IdMap[item.Id] = item;
+        
+        if (!skipEvent && Changed is not null)
+            Changed.Invoke(new ModelListChangeEvent<TModel>(changeType, item));
+    }
+    
+    public virtual void Remove(TModel item, bool skipEvent = false)
+    {
+        if (!IdMap.ContainsKey(item.Id))
+            return;
+        
+        List.Remove(item);
+        IdMap.Remove(item.Id);
+        
+        if (!skipEvent && Changed is not null)
+            Changed.Invoke(new ModelListChangeEvent<TModel>(ListChangeType.Removed, item));
+    }
+    
+    public virtual void Set(List<TModel> items, bool skipEvent = false)
+    {
+        // We clear rather than replace the list to ensure that the reference is maintained
+        // Because the reference may be used across the application.
+        List.Clear();
+        IdMap.Clear();
+        
+        List.AddRange(items);
+        IdMap = List.ToDictionary(x => x.Id);
+        
+        if (!skipEvent && Changed is not null)
+            Changed.Invoke(ModelListChangeEvent<TModel>.Set);
+    }
+    
+    public virtual void Clear(bool skipEvent = false)
+    {
+        List.Clear();
+        IdMap.Clear();
+        if (!skipEvent && Changed is not null)
+            Changed.Invoke(ModelListChangeEvent<TModel>.Clear);
+    }
+    
+    public bool TryGet(TId id, out TModel item)
+    {
+        return IdMap.TryGetValue(id, out item);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool Contains(TModel item)
+    {
+        return IdMap.ContainsKey(item.Id); // This is faster than List.Contains
+        // return List.Contains(item);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool ContainsId(TId id)
+    {
+        return IdMap.ContainsKey(id);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public void Sort(Comparison<TModel> comparison)
+    {
+        List.Sort(comparison);
+    }
+    
+    /// <summary>
+    /// Exists so that external full list changes can be notified.
+    /// </summary>
+    public void NotifySet()
+    {
+        Changed?.Invoke(ModelListChangeEvent<TModel>.Set);
+    }
+    
+    public void Dispose()
+    {
+        Changed?.Dispose();
+        
+        Changed = null;
+        
+        List.Clear();
+        IdMap.Clear();
+    }
+}
+
+/// <summary>
+/// Reactive lists are lists that can be observed for changes.
+/// This version of the list is ordered, and will automatically sort the list when items are added or updated.
+/// </summary>
+public class SortedModelList<TModel, TId> : ModelList<TModel, TId>
+    where TModel : ClientModel<TModel, TId>, ISortable
+    where TId : IEquatable<TId>
+{
+    public SortedModelList(List<TModel> startingList = null) : base(startingList)
+    {
+    }
+
+    public void Upsert(ModelUpdateEvent<TModel> updateEvent, bool skipEvent = false)
+    {
+        Upsert(updateEvent.Model, skipEvent, updateEvent.PositionChange);
+    }
+
+    public override void Upsert(TModel item, bool skipEvent = false)
+    {
+        Upsert(item, skipEvent, null);
+    }
+
+    /// <summary>
+    /// Updates if the item is in the list. If the item is not in the list, it is ignored.
+    /// </summary>
+    public void Update(ModelUpdateEvent<TModel> updateEvent, bool skipEvent = false)
+    {
+        if (!Contains(updateEvent.Model))
+            return;
+        
+        Upsert(updateEvent.Model, skipEvent, updateEvent.PositionChange);
+    }
+
+    public void Upsert(TModel item, bool skipEvent = false, PositionChange? positionChange = null)
+    {
+        ListChangeType changeType;
+
+        var index = List.BinarySearch(item, ISortable.Comparer);
+        if (index < 0)
+        {
+            // Insert new item at the correct position
+            index = ~index;
+            List.Insert(index, item);
+            IdMap[item.Id] = item;
+            changeType = ListChangeType.Added;
+        }
+        else
+        {
+            // If positionChange is specified, resort the item
+            if (positionChange is not null)
+            {
+                List.RemoveAt(index);
+                var newIndex = List.BinarySearch(item, ISortable.Comparer);
+                if (newIndex < 0) newIndex = ~newIndex;
+                List.Insert(newIndex, item);
+            }
+
+            changeType = ListChangeType.Updated;
+        }
+
+        if (!skipEvent && Changed is not null)
+            Changed?.Invoke(new ModelListChangeEvent<TModel>(changeType, item));
+    }
+
+
+    public void UpsertNoSort(TModel item, bool skipEvent = false)
+    {
+        base.Upsert(item, skipEvent);
+    }
+
+    public override void Set(List<TModel> items, bool skipEvent = false)
+    {
+        List.Clear();
+        IdMap.Clear();
+        
+        List.AddRange(items);
+        IdMap = List.ToDictionary(x => x.Id);
+        
+        Sort(false);
+        
+        if (!skipEvent && Changed is not null)
+            Changed.Invoke(ModelListChangeEvent<TModel>.Set);
+    }
+
+    public void Sort(bool skipEvent = false)
+    {
+        List.Sort(ISortable.Compare);
+        
+        if (!skipEvent && Changed is not null)
+            Changed.Invoke(ModelListChangeEvent<TModel>.Reordered);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/ModelLogic/ModelObserver.cs b/Valour/Sdk/ModelLogic/ModelObserver.cs
new file mode 100644
index 000000000..e653368b6
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ModelObserver.cs
@@ -0,0 +1,32 @@
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.ModelLogic;
+
+/// <summary>
+/// The ModelObserver class allows global events to be hooked for entire item types
+/// </summary>
+public static class ModelObserver<T> where T : ClientModel
+{
+    /// <summary>
+    /// Run when any of this item type is updated
+    /// </summary>
+    public static HybridEvent<ModelUpdateEvent<T>> AnyUpdated;
+
+    /// <summary>
+    /// Run when any of this item type is deleted
+    /// </summary>
+    public static HybridEvent<T> AnyDeleted;
+
+    public static void InvokeAnyUpdated(ModelUpdateEvent<T> eventData)
+    {
+        if (AnyUpdated is not null)
+            AnyUpdated.Invoke(eventData);
+    }
+
+    public static void InvokeAnyDeleted(T deleted)
+    {
+        if (AnyDeleted is not null)
+            AnyDeleted.Invoke(deleted);
+    }
+}
+
diff --git a/Valour/Sdk/ModelLogic/ModelQueryEngine.cs b/Valour/Sdk/ModelLogic/ModelQueryEngine.cs
new file mode 100644
index 000000000..303f2d7d4
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ModelQueryEngine.cs
@@ -0,0 +1,190 @@
+using Valour.Sdk.Nodes;
+
+namespace Valour.Sdk.ModelLogic;
+
+/// <summary>
+/// The model query engine allows for efficient querying of models
+/// with automatic global caching and a local sliding cache.
+/// </summary>
+public class ModelQueryEngine<TModel>
+    where TModel : ClientModel<TModel>
+{
+    private readonly string _route;
+    private readonly Node _node;
+    private readonly int _cacheSize;
+    private int? _totalCount; // Updated when fetching missing data, null if unknown
+
+    // Fixed-size array cache
+    private readonly TModel[] _slidingCache;
+    private int _cacheStartIndex; // The index in the dataset corresponding to _cache[0]
+
+    public ModelQueryEngine(Node node, string route, int cacheSize = 200)
+    {
+        _route = route;
+        _node = node;
+        _cacheSize = cacheSize;
+        _slidingCache = new TModel[_cacheSize];
+        _cacheStartIndex = 0;
+    }
+
+    public async Task<ModelQueryResponse<TModel>> GetItemsAsync(int skip, int take)
+    {
+        var items = new List<TModel>(take);
+
+        // Check if requested range is within the current cache window
+        if (IsWithinCache(skip, take))
+        {
+            // Retrieve items from cache
+            var offset = skip - _cacheStartIndex;
+            for (var i = 0; i < take; i++)
+            {
+                items.Add(_slidingCache[offset + i]);
+            }
+        }
+        else
+        {
+            // Adjust the cache window to include the requested range
+            await AdjustCacheWindow(skip, take);
+
+            // After adjusting, retrieve items from cache
+            var offset = skip - _cacheStartIndex;
+            for (var i = 0; i < take; i++)
+            {
+                items.Add(_slidingCache[offset + i]);
+            }
+        }
+
+        return new ModelQueryResponse<TModel>
+        {
+            Items = items,
+            TotalCount = _totalCount ?? items.Count
+        };
+    }
+
+    private bool IsWithinCache(int skip, int take)
+    {
+        return skip >= _cacheStartIndex && (skip + take) <= (_cacheStartIndex + _cacheSize);
+    }
+
+    private async Task AdjustCacheWindow(int skip, int take)
+    {
+        int newStartIndex;
+        if (take >= _cacheSize)
+        {
+            // The requested range is larger than or equal to the cache size
+            newStartIndex = skip;
+        }
+        else if (skip < _cacheStartIndex)
+        {
+            // Scrolling backward
+            newStartIndex = Math.Max(skip - (_cacheSize - take), 0);
+        }
+        else
+        {
+            // Scrolling forward
+            newStartIndex = skip;
+        }
+
+        // Calculate how much to shift existing data
+        int shift = _cacheStartIndex - newStartIndex;
+        if (shift != 0)
+        {
+            ShiftCache(shift);
+        }
+
+        _cacheStartIndex = newStartIndex;
+
+        // Fetch missing data
+        await FetchMissingData();
+    }
+
+    private void ShiftCache(int shift)
+    {
+        if (shift > 0)
+        {
+            // Scrolling backward: Shift right
+            for (var i = _cacheSize - 1; i >= shift; i--)
+            {
+                _slidingCache[i] = _slidingCache[i - shift];
+            }
+
+            // Clear the vacated positions
+            for (var i = 0; i < shift; i++)
+            {
+                _slidingCache[i] = default;
+            }
+        }
+        else if (shift < 0)
+        {
+            // Scrolling forward: Shift left
+            shift = -shift;
+            for (var i = 0; i < _cacheSize - shift; i++)
+            {
+                _slidingCache[i] = _slidingCache[i + shift];
+            }
+
+            // Clear the vacated positions
+            for (var i = _cacheSize - shift; i < _cacheSize; i++)
+            {
+                _slidingCache[i] = default;
+            }
+        }
+    }
+
+    // Fetches missing data and places it into the cache
+    // Returns false if there was an error
+    private async Task<bool> FetchMissingData()
+    {
+        var min = int.MaxValue;
+        var max = -1; // -1 can't happen naturally, so we can use it to see if empty
+        
+        for (var i = 0; i < _cacheSize; i++)
+        {
+            if (_slidingCache[i] == null)
+            {
+                var index = _cacheStartIndex + i;
+                if (index < min)
+                    min = index;
+                
+                if (index > max)
+                    max = index;
+            }
+        }
+        
+        // Nothing to fetch
+        if (max == -1)
+            return true;
+
+        
+        var skip = min;
+        var take = max - skip + 1;
+
+        var result = await _node.GetJsonAsync<ModelQueryResponse<TModel>>($"{_route}?skip={skip}&take={take}");
+
+        if (!result.Success || result.Data.Items is null)
+        {
+            // There will probably be a gap in the cache, but we can't do anything about it
+            // We'll return false so it can be handled.
+            return false;
+        }
+
+        // Update total count
+        _totalCount = result.Data.TotalCount;
+
+        // Sync to client cache and update references in list
+        result.Data.Sync();
+
+        // Place fetched items into local sliding cache
+        for (var i = 0; i < result.Data.Items.Count; i++)
+        {
+            var index = skip + i;
+            var cachePosition = index - _cacheStartIndex;
+            if (cachePosition >= 0 && cachePosition < _cacheSize)
+            {
+                _slidingCache[cachePosition] = result.Data.Items[i];
+            }
+        }
+     
+        return true;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/ModelLogic/ModelQueryResponse.cs b/Valour/Sdk/ModelLogic/ModelQueryResponse.cs
new file mode 100644
index 000000000..f33abc234
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ModelQueryResponse.cs
@@ -0,0 +1,15 @@
+using Valour.Shared.Models;
+
+namespace Valour.Sdk.ModelLogic;
+
+public class ModelQueryResponse<T> : QueryResponse<T>
+    where T : ClientModel<T>
+{
+    public void Sync()
+    {
+        for (int i = 0; i < Items.Count; i++)
+        {
+            Items[i] = Items[i].Node.Client.Cache.Sync(Items[i]);
+        }
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/ModelLogic/ModelUpdateEvent.cs b/Valour/Sdk/ModelLogic/ModelUpdateEvent.cs
new file mode 100644
index 000000000..bd114d98e
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ModelUpdateEvent.cs
@@ -0,0 +1,67 @@
+namespace Valour.Sdk.ModelLogic;
+
+public struct PositionChange
+{
+    public uint OldPosition { get; set; }
+    public uint NewPosition { get; set; }
+}
+
+public class ModelUpdateEvent<TModel> : IDisposable
+    where TModel : ClientModel
+{
+    private bool _disposed = false;
+    
+    /// <summary>
+    /// The new or updated item
+    /// </summary>
+    public TModel Model { get; set; }
+
+    /// <summary>
+    /// The fields that changed on the item
+    /// </summary>
+    public HashSet<string> PropsChanged { get; set; }
+    
+    /// <summary>
+    /// If not null, the position change of the item
+    /// </summary>
+    public PositionChange PositionChange { get; set; }
+    
+    /// <summary>
+    /// True if the item is new to the client
+    /// </summary>
+    public bool NewToClient { get; set; }
+    
+    /// <summary>
+    /// Additional data for the event
+    /// </summary>
+    public int? Flags { get; set; }
+    
+    // Cleanup: Return PropsChanged to pool
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+
+    protected virtual void Dispose(bool disposing)
+    {
+        if (_disposed)
+            return;
+
+        if (disposing)
+        {
+            if (PropsChanged != null)
+            {
+                ModelUpdater.ReturnPropsChanged(PropsChanged);
+                PropsChanged = null;
+            }
+        }
+        
+        _disposed = true;
+    }
+
+    ~ModelUpdateEvent()
+    {
+        Dispose(false);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/ModelLogic/ModelUpdater.cs b/Valour/Sdk/ModelLogic/ModelUpdater.cs
new file mode 100644
index 000000000..b56a7e1b2
--- /dev/null
+++ b/Valour/Sdk/ModelLogic/ModelUpdater.cs
@@ -0,0 +1,158 @@
+using System.Reflection;
+using Microsoft.Extensions.ObjectPool;
+using Valour.Shared.Extensions;
+using Valour.Shared.Models;
+
+namespace Valour.Sdk.ModelLogic;
+
+/// <summary>
+/// Responsible for pushing model updates across the client
+/// </summary>
+public static class ModelUpdater
+{
+    
+    // Cache for type properties
+    // The properties of models are cached to avoid reflection overhead
+    // It's not like the properties will change during runtime
+    private static readonly Dictionary<Type, PropertyInfo[]> ModelPropertyCache = new ();
+    
+    // Same for fields
+    private static readonly Dictionary<Type, FieldInfo[]> ModelFieldCache = new ();
+    
+    // Pool for PropsChanged hashsets
+    private static readonly ObjectPool<HashSet<string>> HashSetPool = 
+        new DefaultObjectPoolProvider().Create(new HashSetPooledObjectPolicy<string>());
+
+    static ModelUpdater()
+    {
+        // Cache all properties of all models
+        foreach (var modelType in typeof(ClientModel).Assembly.GetTypes())
+        {
+            if (modelType.IsSubclassOf(typeof(ClientModel)))
+            {
+                ModelPropertyCache[modelType] = modelType.GetProperties();
+                ModelFieldCache[modelType] = modelType.GetFields();
+            }
+        }
+    }
+    
+    public static void ReturnPropsChanged(HashSet<string> propsChanged)
+    {
+        HashSetPool.Return(propsChanged);
+    }
+    
+    public static void AddPositionChange<TModel>(ISortableModel<TModel> oldModel, ISortableModel<TModel> newModel, ModelUpdateEvent<TModel> eventData) 
+        where TModel : ClientModel<TModel>
+    {
+        if (oldModel.GetSortPosition() != newModel.GetSortPosition())
+        {
+            eventData.PositionChange = new PositionChange()
+            {
+                OldPosition = oldModel.GetSortPosition(),
+                NewPosition = newModel.GetSortPosition()
+            };
+        }
+    }
+    
+    public static void AddPositionChange<TModel>(TModel oldModel, TModel newModel, ModelUpdateEvent<TModel> eventData) 
+        where TModel : ClientModel<TModel>
+    {
+        return;
+    }
+    
+    /// <summary>
+    /// Updates a model's properties and returns the global instance
+    /// </summary>
+    public static TModel UpdateItem<TModel>(TModel updated, TModel cached, int flags, bool skipEvent = false) 
+        where TModel : ClientModel<TModel>
+    {
+        // Create object for event data
+        var eventData = new ModelUpdateEvent<TModel>()
+        {
+            Flags = flags,
+            PropsChanged = HashSetPool.Get(),
+            Model = cached,
+            NewToClient = cached is null
+        };
+        
+        if (!eventData.NewToClient)
+        {
+            // Find changed properties
+            var pInfo = ModelPropertyCache[typeof(TModel)];
+
+            foreach (var prop in pInfo)
+            {
+                if (prop.GetValue(cached) != prop.GetValue(updated))
+                    eventData.PropsChanged.Add(prop.Name);
+            }
+            
+            // Check position change
+            AddPositionChange<TModel>(cached, updated, eventData);
+            
+            // Update local copy
+            // This uses the cached property info to avoid expensive reflection
+            updated.CopyAllTo(cached, pInfo, null);
+        }
+
+        if (!skipEvent)
+        {
+            // Update
+            if (cached is not null)
+            {
+                eventData.Model = cached;
+                // Fire off local event on item
+                cached.InvokeUpdatedEvent(eventData);
+            }
+            // New
+            else
+            {
+                eventData.Model = updated;
+                
+                // Add to cache
+                updated.AddToCacheOrReturnExisting();
+                // Fire off local event on item
+                updated.InvokeUpdatedEvent(eventData);
+            }
+            
+            // Fire off global events
+            ModelObserver<TModel>.InvokeAnyUpdated(eventData);
+
+            // printing to console is SLOW, only turn on for debugging reasons
+            //Console.WriteLine("Invoked update events for " + updated.Id);
+        }
+        
+        return cached ?? updated;
+    }
+    
+    /// <summary>
+    /// Updates an item's properties
+    /// </summary>
+    public static void DeleteItem<TModel>(TModel model) 
+        where TModel : ClientModel<TModel>
+    {
+        var cached = model.TakeAndRemoveFromCache();
+        if (cached is null)
+        {
+            // Invoke static "any" delete
+            model.InvokeDeletedEvent();
+            ModelObserver<TModel>.InvokeAnyDeleted(model);
+        }
+        else
+        {
+            // Invoke static "any" delete
+            cached.InvokeDeletedEvent();
+            ModelObserver<TModel>.InvokeAnyDeleted(cached);
+        }
+    }
+}
+
+public class HashSetPooledObjectPolicy<T> : PooledObjectPolicy<HashSet<T>>
+{
+    public override HashSet<T> Create() => new HashSet<T>();
+
+    public override bool Return(HashSet<T> obj)
+    {
+        obj.Clear();
+        return true;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Models/ConnectionLockResult.cs b/Valour/Sdk/Models/ConnectionLockResult.cs
new file mode 100644
index 000000000..26cad8554
--- /dev/null
+++ b/Valour/Sdk/Models/ConnectionLockResult.cs
@@ -0,0 +1,8 @@
+namespace Valour.Sdk.Models;
+
+public enum ConnectionLockResult
+{
+    NotFound,
+    Locked,
+    Unlocked,
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Models/InitialPlanetData.cs b/Valour/Sdk/Models/InitialPlanetData.cs
new file mode 100644
index 000000000..835e28ae3
--- /dev/null
+++ b/Valour/Sdk/Models/InitialPlanetData.cs
@@ -0,0 +1,34 @@
+namespace Valour.Sdk.Models;
+
+/// <summary>
+/// Rather than using multiple API calls to get the initial data for a planet,
+/// we can use this class to store all the data we need in one go.
+/// </summary>
+public class InitialPlanetData
+{
+    /// <summary>
+    /// The planet this data was requested for
+    /// </summary>
+    public long PlanetId { get; set; }
+    
+    /// <summary>
+    /// The roles within the planet
+    /// </summary>
+    public List<PlanetRole> Roles { get; set; }
+    
+    /// <summary>
+    /// The channels within the planet that the user has access to
+    /// </summary>
+    public List<Channel> Channels { get; set; }
+    
+    /// <summary>
+    /// Initial member data. Will include most recently active members, but may not
+    /// include all members
+    /// </summary>
+    public List<PlanetMemberData> MemberData { get; set; }
+    
+    /// <summary>
+    /// The 
+    /// </summary>
+    public List<PermissionsNode> Permissions { get; set; }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/AuthService.cs b/Valour/Sdk/Services/AuthService.cs
new file mode 100644
index 000000000..6bfbfdf7c
--- /dev/null
+++ b/Valour/Sdk/Services/AuthService.cs
@@ -0,0 +1,135 @@
+using System.Net.Http.Json;
+using System.Text.Json;
+using Valour.Sdk.Client;
+using Valour.Shared;
+using Valour.Shared.Models;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.Services;
+
+/// <summary>
+/// Handles tokens and authentication
+/// </summary>
+public class AuthService : ServiceBase
+{
+    /// <summary>
+    /// Run when the user logs in
+    /// </summary>
+    public HybridEvent<User> LoggedIn;
+    
+    /// <summary>
+    /// The token for this client instance
+    /// </summary>
+    public string Token => _token;
+
+    /// <summary>
+    /// The internal token for this client
+    /// </summary>
+    private string _token;
+
+    private static readonly LogOptions LogOptions = new(
+        "AuthService",
+        "#0083ab",
+        "#ab0055",
+        "#ab8900"
+    );
+
+    private readonly ValourClient _client;
+    
+    public AuthService(ValourClient client)
+    {
+        _client = client;
+        SetupLogging(client.Logger, LogOptions);
+    }
+    
+    /// <summary>
+    /// Gets the Token for the client
+    /// </summary>
+    public async Task<TaskResult<string>> FetchToken(string email, string password)
+    {
+        TokenRequest request = new()
+        {
+            Email = email,
+            Password = password
+        };
+
+        var httpContent = JsonContent.Create(request);
+        var response = await _client.Http.PostAsync($"api/users/token", httpContent);
+        
+        
+        if (response.IsSuccessStatusCode)
+        {
+            var token = await response.Content.ReadFromJsonAsync<AuthToken>();
+            _token = token.Id;
+
+            return TaskResult<string>.FromData(_token);
+        }
+
+        return new TaskResult<string>()
+        {
+            Success = false,
+            Message = await response.Content.ReadAsStringAsync(),
+            Code = (int) response.StatusCode
+        };
+    }
+    
+    public void SetToken(string token)
+    {
+        _token = token;
+    }
+
+    public async Task<TaskResult> LoginAsync(string email, string password)
+    {
+        var tokenResult = await FetchToken(email, password);
+        if (!tokenResult.Success)
+            return tokenResult.WithoutData();
+        
+        return await LoginAsync();
+    }
+    
+    public async Task<TaskResult> LoginAsync()
+    {
+        // Ensure any existing auth headers are removed
+        if (_client.Http.DefaultRequestHeaders.Contains("authorization"))
+        {
+            _client.Http.DefaultRequestHeaders.Remove("authorization");
+        }
+        
+        // Add auth header to main http client so we never have to do that again
+        _client.Http.DefaultRequestHeaders.Add("authorization", Token);
+        
+        if (_client.PrimaryNode is null)
+            await _client.NodeService.SetupPrimaryNodeAsync();
+        
+        var response = await _client.PrimaryNode!.GetJsonAsync<User>($"api/users/me");
+
+        if (!response.Success)
+            return response.WithoutData();
+
+        _client.Me = _client.Cache.Sync(response.Data);
+        
+        LoggedIn?.Invoke(_client.Me);
+
+        return new TaskResult(true, "Success");
+    }
+
+    public Task<TaskResult> RegisterAsync(RegisterUserRequest request)
+    {
+        return _client.PrimaryNode.PostAsync("api/users/register", request);
+    }
+    
+    /// <summary>
+    /// Sets the compliance data for the current user
+    /// </summary>
+    public async ValueTask<TaskResult> SetComplianceDataAsync(DateTime birthDate, Locality locality)
+    {
+        var result = await _client.PrimaryNode.PostAsync($"api/users/me/compliance/{birthDate.ToString("s")}/{locality}", null);
+        var taskResult = new TaskResult()
+        {
+            Success = result.Success,
+            Message = result.Message
+        };
+
+        return taskResult;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/BotService.cs b/Valour/Sdk/Services/BotService.cs
new file mode 100644
index 000000000..a0d4e2953
--- /dev/null
+++ b/Valour/Sdk/Services/BotService.cs
@@ -0,0 +1,77 @@
+using Valour.Sdk.Client;
+using Valour.Shared;
+
+namespace Valour.Sdk.Services;
+
+/// <summary>
+/// Provides functionality for running Valour headless bots
+/// </summary>
+public class BotService : ServiceBase
+{
+    private readonly ValourClient _client;
+    
+    public BotService(ValourClient client)
+    {
+        _client = client;
+        SetupLogging(client.Logger);
+    }
+    
+    /// <summary>
+    /// Logs in and prepares the bot's client for use
+    /// </summary>
+    public async Task<TaskResult> InitializeBot(string email, string password)
+    {
+        // Ensure client HTTP client is set
+        _client.SetupHttpClient();
+
+        // Login to account
+        var userResult = await _client.AuthService.LoginAsync(email, password);
+        if (!userResult.Success)
+            return userResult;
+        
+        // Now that we have our user, we can set up our primary node
+        await _client.NodeService.SetupPrimaryNodeAsync();
+
+        Console.WriteLine($"Initialized bot {_client.Me.Name} ({_client.Me.Id})");
+
+        await JoinAllChannelsAsync();
+
+        return new TaskResult(true, "Success");
+    }
+    
+    /// <summary>
+    /// Should only be run during initialization of bots!
+    /// </summary>
+    public async Task JoinAllChannelsAsync()
+    {
+        // Get all joined planets
+        var planets = (await _client.PrimaryNode.GetJsonAsync<List<Planet>>("api/users/me/planets")).Data;
+
+        var planetTasks = new List<Task>();
+        
+        // Add to cache
+        foreach (var planet in planets)
+        {
+            var cached = _client.Cache.Sync(planet);
+            await planet.FetchChannelsAsync();
+            
+            planetTasks.Add(Task.Run(async () =>
+            {
+                await _client.PlanetService.TryOpenPlanetConnection(planet, "bot-init");
+                
+                var channelTasks = new List<Task>();
+                
+                foreach (var channel in planet.Channels)
+                {
+                    channelTasks.Add(_client.ChannelService.TryOpenPlanetChannelConnection(channel, "bot-init"));
+                }
+                
+                await Task.WhenAll(channelTasks);
+            }));
+        }
+
+        await Task.WhenAll(planetTasks);
+
+        _client.PlanetService.SetJoinedPlanets(planets);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/CacheService.cs b/Valour/Sdk/Services/CacheService.cs
new file mode 100644
index 000000000..7b810d0b3
--- /dev/null
+++ b/Valour/Sdk/Services/CacheService.cs
@@ -0,0 +1,90 @@
+using Valour.Sdk.Client;
+using Valour.Sdk.ModelLogic;
+using Valour.Sdk.Models.Economy;
+using Valour.Sdk.Models.Themes;
+
+namespace Valour.Sdk.Services;
+
+/// <summary>
+/// The CacheService provides caching for the Valour client.
+/// </summary>
+public class CacheService
+{
+    /////////////
+    // Lookups //
+    /////////////
+    
+    public readonly Dictionary<DirectChannelKey, long> DmChannelKeyToId = new();
+    public readonly Dictionary<PermissionsNodeKey, long> PermNodeKeyToId = new();
+    public readonly Dictionary<PlanetMemberKey, long> MemberKeyToId = new();
+    
+    //////////////////
+    // Model Caches // 
+    //////////////////
+
+    public readonly ModelCache<User, long> Users = new();
+    public readonly ModelCache<EcoAccount, long> EcoAccounts = new();
+    public readonly ModelCache<Currency, long> Currencies = new();
+    public readonly ModelCache<Channel, long> Channels = new();
+    public readonly ModelCache<UserFriend, long> UserFriends = new();
+    public readonly ModelCache<UserProfile, long> UserProfiles = new();
+    public readonly ModelCache<ChannelMember, long> ChannelMembers = new();
+    public readonly ModelCache<Theme, long> Themes = new();
+    public readonly ModelCache<OauthApp, long> OauthApps = new();
+    
+    public readonly ModelCache<Message, long> Messages = new();
+    
+    public readonly ModelCache<Planet, long> Planets = new();
+    public readonly ModelCache<PlanetMember, long> PlanetMembers = new();
+    public readonly ModelCache<PlanetRole, long> PlanetRoles = new();
+    public readonly ModelCache<PlanetBan, long> PlanetBans = new();
+    public readonly ModelCache<PermissionsNode, long> PermissionsNodes = new();
+    public readonly ModelCache<PlanetInvite, string> PlanetInvites = new(); 
+    
+    private readonly ValourClient _client;
+    
+    public CacheService(ValourClient client)
+    {
+        _client = client;
+    }
+    
+    /// <summary>
+    /// Pushes this version of this model to cache and optionally
+    /// fires off event for the update. Flags can be added for additional data.
+    /// Returns the global cached instance of the model.
+    /// </summary>
+    public TModel Sync<TModel>(TModel model, bool skipEvent = false, int flags = 0)
+        where TModel : ClientModel<TModel>
+    {
+        if (model is null)
+            return null;
+        
+        // Let the model know what client it is associated with
+        model.SetClient(_client);
+
+        model.SyncSubModels(skipEvent, flags);
+        
+        // Add to cache or get the existing cached instance
+        var existing = model.AddToCacheOrReturnExisting();
+        
+        // Update the existing model with the new data, or broadcast the new item
+        return ModelUpdater.UpdateItem<TModel>(model, existing, flags, skipEvent); // Update if already exists
+    }
+    
+    /// <summary>
+    /// Removes the model from cache and optionally fires off event for the deletion.
+    /// </summary>
+    public void Delete<TModel>(TModel model, bool skipEvent = false)
+        where TModel : ClientModel<TModel>
+    {
+        if (model is null)
+            return;
+        
+        // Remove from cache
+        model.TakeAndRemoveFromCache();
+        
+        // Broadcast the deletion
+        if (!skipEvent)
+            ModelUpdater.DeleteItem<TModel>(model);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/ChannelService.cs b/Valour/Sdk/Services/ChannelService.cs
new file mode 100644
index 000000000..dc52f75fb
--- /dev/null
+++ b/Valour/Sdk/Services/ChannelService.cs
@@ -0,0 +1,376 @@
+using Microsoft.AspNetCore.SignalR.Client;
+using Valour.Sdk.Client;
+using Valour.Sdk.Nodes;
+using Valour.Sdk.Requests;
+using Valour.Shared;
+using Valour.Shared.Channels;
+using Valour.Shared.Models;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.Services;
+
+public class ChannelService : ServiceBase
+{
+    /// <summary>
+    /// Run when SignalR opens a channel
+    /// </summary>
+    public HybridEvent<Channel> ChannelConnected;
+
+    /// <summary>
+    /// Run when SignalR closes a channel
+    /// </summary>
+    public HybridEvent<Channel> ChannelDisconnected;
+    
+    /// <summary>
+    /// Run when a category is reordered
+    /// </summary>
+    public HybridEvent<CategoryOrderEvent> CategoryReordered;
+
+    /// <summary>
+    /// Currently opened channels
+    /// </summary>
+    public readonly IReadOnlyList<Channel> ConnectedPlanetChannels;
+    private readonly List<Channel> _connectedPlanetChannels = new();
+
+    /// <summary>
+    /// Connected channels lookup
+    /// </summary>
+    public readonly IReadOnlyDictionary<long, Channel> ConnectedPlanetChannelsLookup;
+    private readonly Dictionary<long, Channel> _connectedPlanetChannelsLookup = new();
+
+    /// <summary>
+    /// A set of locks used to prevent channel connections from closing automatically
+    /// </summary>
+    public readonly IReadOnlyDictionary<string, long> ChannelLocks;
+    private readonly Dictionary<string, long> _channelLocks = new();
+
+    /// <summary>
+    /// The direct chat channels (dms) of this user
+    /// </summary>
+    public readonly IReadOnlyList<Channel> DirectChatChannels;
+    private readonly List<Channel> _directChatChannels = new();
+
+    /// <summary>
+    /// Lookup for direct chat channels
+    /// </summary>
+    public readonly IReadOnlyDictionary<long, Channel> DirectChatChannelsLookup;
+    private readonly Dictionary<long, Channel> _directChatChannelsLookup = new();
+    
+    private readonly LogOptions _logOptions = new(
+        "ChannelService",
+        "#3381a3",
+        "#a3333e",
+        "#a39433"
+    );
+    
+    private readonly ValourClient _client;
+    private readonly CacheService _cache;
+    
+    public ChannelService(ValourClient client)
+    {
+        _client = client;
+        _cache = client.Cache;
+        
+        ConnectedPlanetChannels = _connectedPlanetChannels;
+        ChannelLocks = _channelLocks;
+        ConnectedPlanetChannelsLookup = _connectedPlanetChannelsLookup;
+        
+        DirectChatChannels = _directChatChannels;
+        DirectChatChannelsLookup = _directChatChannelsLookup;
+        
+        SetupLogging(client.Logger, _logOptions);
+        
+        // Reconnect channels on node reconnect
+        client.NodeService.NodeReconnected += OnNodeReconnect;
+        client.NodeService.NodeAdded += HookHubEvents;
+    }
+    
+    /// <summary>
+    /// Given a channel id, returns the channel. Planet channels should be fetched via the Planet.
+    /// </summary>
+    public async ValueTask<Channel> FetchChannelAsync(long id, bool skipCache = false)
+    {
+        if (!skipCache && _cache.Channels.TryGet(id, out var cached))
+            return cached;
+
+        var channel = (await _client.PrimaryNode.GetJsonAsync<Channel>(ISharedChannel.GetIdRoute(id))).Data;
+
+        return _cache.Sync(channel);
+    }
+
+    public async ValueTask<Channel> FetchChannelAsync(long id, long planetId, bool skipCache = false)
+    {
+        var planet = await _client.PlanetService.FetchPlanetAsync(planetId, skipCache);
+        return await FetchChannelAsync(id, planet, skipCache);
+    }
+    
+    public async ValueTask<Channel> FetchChannelAsync(long id, Planet planet, bool skipCache = false)
+    {
+        if (!skipCache && _cache.Channels.TryGet(id, out var cached))
+            return cached;
+
+        var channel = (await planet.Node.GetJsonAsync<Channel>(ISharedChannel.GetIdRoute(id))).Data;
+
+        return _cache.Sync(channel);
+    }
+
+    public Task<TaskResult<Channel>> CreatePlanetChannelAsync(Planet planet, CreateChannelRequest request)
+    {
+        request.Channel.PlanetId = planet.Id;
+        return planet.Node.PostAsyncWithResponse<Channel>(request.Channel.BaseRoute, request);
+    }
+    
+    /// <summary>
+    /// Given a user id, returns the direct channel between them and the requester.
+    /// If create is true, this will create the channel if it is not found.
+    /// </summary>
+    public async ValueTask<Channel> FetchDmChannelAsync(long otherUserId, bool create = false, bool skipCache = false)
+    {
+        var key = new DirectChannelKey(_client.Me.Id, otherUserId);
+
+        if (!skipCache &&
+            _cache.DmChannelKeyToId.TryGetValue(key, out var id) &&
+            _cache.Channels.TryGet(id, out var cached))
+            return cached;
+
+        var dmChannel = (await _client.PrimaryNode.GetJsonAsync<Channel>(
+            $"{ISharedChannel.BaseRoute}/direct/{otherUserId}?create={create}")).Data;
+
+        return _cache.Sync(dmChannel);
+    }
+    
+    public async Task LoadDmChannelsAsync()
+    {
+        var response = await _client.PrimaryNode.GetJsonAsync<List<Channel>>("api/channels/direct/self");
+        if (!response.Success)
+        {
+            LogError("Failed to load direct chat channels!");
+            LogError(response.Message);
+
+            return;
+        }
+        
+        // Clear existing
+        _directChatChannels.Clear();
+        _directChatChannelsLookup.Clear();
+        
+        foreach (var channel in response.Data)
+        {
+            // Custom cache insert behavior
+            if (channel.Members is not null && channel.Members.Count > 0)
+            {
+                var id0 = channel.Members[0].Id;
+                
+                // Self channel
+                if (channel.Members.Count == 1)
+                {
+                    var key = new DirectChannelKey(id0, id0);
+                    _cache.DmChannelKeyToId.Add(key, channel.Id);
+                }
+                // Other channel
+                else if (channel.Members.Count == 2)
+                {
+                    var id1 = channel.Members[1].Id;
+                    var key = new DirectChannelKey(id0, id1);
+                    _cache.DmChannelKeyToId.Add(key, channel.Id);
+                }
+            }
+
+            var cached = _cache.Sync(channel);
+            _directChatChannels.Add(cached);
+            _directChatChannelsLookup.Add(cached.Id, cached);
+        }
+        
+        Log($"Loaded {DirectChatChannels.Count} direct chat channels...");
+    }
+    
+    /// <summary>
+    /// Opens a SignalR connection to a channel if it does not already have one,
+    /// and stores a key to prevent it from being closed
+    /// </summary>
+    public async Task<TaskResult> TryOpenPlanetChannelConnection(Channel channel, string key)
+    {
+        if (channel.ChannelType != ChannelTypeEnum.PlanetChat)
+            return TaskResult.FromFailure("Channel is not a planet chat channel");
+
+        if (_channelLocks.ContainsKey(key))
+        {
+            _channelLocks[key] = channel.Id;
+        }
+        else
+        {
+            // Add lock
+            AddChannelLock(key, channel.Id);   
+        }
+        
+        // Already opened
+        if (_connectedPlanetChannels.Contains(channel))
+            return TaskResult.SuccessResult;
+
+        var planet = channel.Planet;
+
+        // Ensure planet is opened
+        var planetResult = await _client.PlanetService.TryOpenPlanetConnection(planet, key);
+        if (!planetResult.Success)
+            return planetResult;
+
+        // Join channel SignalR group
+        var result = await channel.Node.HubConnection.InvokeAsync<TaskResult>("JoinChannel", channel.Id);
+        
+        if (!result.Success)
+        {
+            LogError(result.Message);
+            return result;
+        }
+        
+        Log(result.Message);
+        
+        // Add to open set
+        _connectedPlanetChannels.Add(channel);
+        _connectedPlanetChannelsLookup[channel.Id] = channel;
+
+        Log($"Joined SignalR group for channel {channel.Name} ({channel.Id})");
+
+        ChannelConnected?.Invoke(channel);
+        
+        return TaskResult.SuccessResult;
+    }
+
+    /// <summary>
+    /// Closes a SignalR connection to a channel
+    /// </summary>
+    public async Task<TaskResult> TryClosePlanetChannelConnection(Channel channel, string key, bool force = false)
+    {
+        if (channel.ChannelType != ChannelTypeEnum.PlanetChat)
+            return TaskResult.FromFailure("Channel is not a planet chat channel");
+
+        if (!force)
+        {
+            // Remove key from locks
+            var lockResult = RemoveChannelLock(key);
+
+            // If there are still any locks, don't close
+            if (lockResult == ConnectionLockResult.Locked)
+            {
+                return TaskResult.FromFailure("Channel is locked by other keys.");
+            } 
+            // If for some reason our key isn't actually there
+            // (shouldn't happen, but just in case)
+            else if (lockResult == ConnectionLockResult.NotFound)
+            {
+                if (_channelLocks.Values.Any(x => x == channel.Id))
+                {
+                    return TaskResult.FromFailure("Channel is locked by other keys.");
+                }
+            }
+        }
+
+        // Not opened
+        if (!_connectedPlanetChannels.Contains(channel))
+            return TaskResult.FromFailure("Channel is not open.");
+
+        // Leaves channel SignalR group
+        await channel.Node.HubConnection.SendAsync("LeaveChannel", channel.Id);
+
+        // Remove from open set
+        _connectedPlanetChannels.Remove(channel);
+        _connectedPlanetChannelsLookup.Remove(channel.Id);
+
+        Log($"Left SignalR group for channel {channel.Name} ({channel.Id})");
+
+        ChannelDisconnected?.Invoke(channel);
+
+        // Close planet connection if no other channels are open
+        await _client.PlanetService.TryClosePlanetConnection(channel.Planet, key);
+        
+        return TaskResult.SuccessResult;
+    }
+    
+    /// <summary>
+    /// Prevents a channel from closing connections automatically.
+    /// Key is used to allow multiple locks per channel.
+    /// </summary>
+    private void AddChannelLock(string key, long planetId)
+    {
+        _channelLocks[key] = planetId;
+    }
+
+    /// <summary>
+    /// Removes the lock for a channel.
+    /// Returns the result of if there are any locks left for the channel.
+    /// </summary>
+    private ConnectionLockResult RemoveChannelLock(string key)
+    {
+        if (_channelLocks.TryGetValue(key, out var channelId))
+        {
+            Log($"Channel lock {key} removed.");
+            _channelLocks.Remove(key);
+            return _channelLocks.Any(x => x.Value == channelId)
+                ? ConnectionLockResult.Locked
+                : ConnectionLockResult.Unlocked;
+        }
+        
+        return ConnectionLockResult.NotFound;
+    }
+    
+    /// <summary>
+    /// Returns if the channel is open
+    /// </summary>
+    public bool IsChannelConnected(long channelId) =>
+        _connectedPlanetChannelsLookup.ContainsKey(channelId);
+
+    
+    // TODO: change
+    public void OnCategoryOrderUpdate(CategoryOrderEvent eventData)
+    {
+        // Update channels in cache
+        uint pos = 0;
+        foreach (var data in eventData.Order)
+        {
+            if (_client.Cache.Channels.TryGet(data.Id, out var channel))
+            {
+                // The parent can be changed in this event
+                channel.ParentId = eventData.CategoryId;
+
+                // Position can be changed in this event
+                channel.RawPosition = pos;
+            }
+
+            pos++;
+        }
+        
+        CategoryReordered?.Invoke(eventData);
+    }
+    
+    public void OnWatchingUpdate(ChannelWatchingUpdate update)
+    {
+        if (!_cache.Channels.TryGet(update.ChannelId, out var channel))
+            return;
+        
+        channel.WatchingUpdated?.Invoke(update);
+    }
+
+    public void OnTypingUpdate(ChannelTypingUpdate update)
+    {
+        if (!_cache.Channels.TryGet(update.ChannelId, out var channel))
+            return;
+        
+        channel.TypingUpdated?.Invoke(update);
+    }
+
+    private void HookHubEvents(Node node)
+    {
+        node.HubConnection.On<CategoryOrderEvent>("CategoryOrder-Update", OnCategoryOrderUpdate);
+        node.HubConnection.On<ChannelWatchingUpdate>("Channel-Watching-Update", OnWatchingUpdate);
+        node.HubConnection.On<ChannelTypingUpdate>("Channel-CurrentlyTyping-Update", OnTypingUpdate);
+    }
+    
+    private async Task OnNodeReconnect(Node node)
+    {
+        foreach (var channel in _connectedPlanetChannels.Where(x => x.Node?.Name == node.Name))
+        {
+            await node.HubConnection.SendAsync("JoinChannel", channel.Id);
+            Log($"Rejoined SignalR group for channel {channel.Id}");
+        }
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/ChannelStateService.cs b/Valour/Sdk/Services/ChannelStateService.cs
new file mode 100644
index 000000000..c061f9ffb
--- /dev/null
+++ b/Valour/Sdk/Services/ChannelStateService.cs
@@ -0,0 +1,154 @@
+using Microsoft.AspNetCore.SignalR.Client;
+using Valour.Sdk.Client;
+using Valour.Sdk.Nodes;
+using Valour.Shared.Models;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.Services;
+
+public class ChannelStateService : ServiceBase
+{
+    /// <summary>
+    /// Run when a UserChannelState is updated
+    /// </summary>
+    public HybridEvent<UserChannelState> UserChannelStateUpdated;
+    
+    /// <summary>
+    /// Run when a channel state updates
+    /// </summary>
+    public HybridEvent<ChannelStateUpdate> ChannelStateUpdated;
+
+    /// <summary>
+    /// The state of channels this user has access to
+    /// </summary>
+    public readonly IReadOnlyDictionary<long, DateTime?> ChannelsLastViewedState;
+    private readonly Dictionary<long, DateTime?> _channelsLastViewedState = new();
+
+    /// <summary>
+    /// The last update times of channels this user has access to
+    /// </summary>
+    public readonly IReadOnlyDictionary<long, ChannelState> CurrentChannelStates;
+    private readonly Dictionary<long, ChannelState> _currentChannelStates = new();
+    
+    private static readonly LogOptions LogOptions = new(
+        "ChannelStateService",
+        "#5c33a3",
+        "#a33340",
+        "#a39433"
+    );
+    
+    private readonly ValourClient _client;
+    
+    public ChannelStateService(ValourClient client)
+    {
+        _client = client;
+
+        ChannelsLastViewedState = _channelsLastViewedState;
+        CurrentChannelStates = _currentChannelStates;
+        
+        SetupLogging(client.Logger, LogOptions);
+        
+        _client.NodeService.NodeAdded += HookHubEvents;
+    }
+    
+    public async Task LoadChannelStatesAsync()
+    {
+        var response = await _client.PrimaryNode.GetJsonAsync<List<ChannelStateData>>($"api/users/me/statedata");
+        if (!response.Success)
+        {
+            Console.WriteLine("** Failed to load channel states **");
+            Console.WriteLine(response.Message);
+
+            return;
+        }
+
+        foreach (var state in response.Data)
+        {
+            if (state.ChannelState is not null)
+                _currentChannelStates[state.ChannelId] = state.ChannelState;
+            
+            if (state.LastViewedTime is not null)
+                _channelsLastViewedState[state.ChannelId] = state.LastViewedTime;
+        }
+
+        Console.WriteLine("Loaded " + ChannelsLastViewedState.Count + " channel states.");
+        // Console.WriteLine(JsonSerializer.Serialize(response.Data));
+    }
+    
+    public void SetChannelLastViewedState(long channelId, DateTime lastViewed)
+    {
+        _channelsLastViewedState[channelId] = lastViewed;
+    }
+
+    public bool GetPlanetUnreadState(long planetId)
+    {
+        var channelStates = 
+            CurrentChannelStates.Where(x => x.Value.PlanetId == planetId);
+        
+        foreach (var state in channelStates)
+        {
+            if (GetChannelUnreadState(state.Key))
+                return true;
+        }
+
+        return false;
+    }
+
+    public bool GetChannelUnreadState(long channelId)
+    {
+        // TODO: this will act weird with multiple tabs
+        if (_client.ChannelService.IsChannelConnected(channelId))
+            return false;
+
+        if (!_channelsLastViewedState.TryGetValue(channelId, out var lastRead))
+        {
+            return true;
+        }
+
+        if (!_currentChannelStates.TryGetValue(channelId, out var lastUpdate))
+        {
+            return false;
+        }
+
+        return lastRead < lastUpdate.LastUpdateTime;
+    }
+    
+    public void OnChannelStateUpdated(ChannelStateUpdate update)
+    {
+        // Right now only planet chat channels have state updates
+        if (!_client.Cache.Channels.TryGet(update.ChannelId, out var channel))
+        {
+            return;
+        }
+        
+        if (!_currentChannelStates.TryGetValue(channel.Id, out var state))
+        {
+            state = new ChannelState()
+            {
+                ChannelId = update.ChannelId,
+                PlanetId = update.PlanetId,
+                LastUpdateTime = update.Time
+            };
+
+            _currentChannelStates[channel.Id] = state;
+        }
+        else
+        {
+            _currentChannelStates[channel.Id].LastUpdateTime = update.Time;
+        }
+        
+        ChannelStateUpdated?.Invoke(update);
+    }
+    
+    public void OnUserChannelStateUpdated(UserChannelState channelState)
+    {
+        _channelsLastViewedState[channelState.ChannelId] = channelState.LastViewedTime;
+        UserChannelStateUpdated?.Invoke(channelState);
+    }
+
+    private void HookHubEvents(Node node)
+    {
+        node.HubConnection.On<ChannelStateUpdate>("Channel-State", OnChannelStateUpdated);
+        node.HubConnection.On<UserChannelState>("UserChannelState-Update", OnUserChannelStateUpdated);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/EcoService.cs b/Valour/Sdk/Services/EcoService.cs
new file mode 100644
index 000000000..efe99238a
--- /dev/null
+++ b/Valour/Sdk/Services/EcoService.cs
@@ -0,0 +1,206 @@
+using System.Web;
+using Valour.Sdk.Client;
+using Valour.Sdk.ModelLogic;
+using Valour.Sdk.Models.Economy;
+using Valour.Shared;
+using Valour.Shared.Models;
+using Valour.Shared.Models.Economy;
+
+namespace Valour.Sdk.Services;
+
+public class EcoService : ServiceBase
+{
+    private static readonly LogOptions LogOptions = new(
+        "EcoService",
+        "#0083ab",
+        "#ab0055",
+        "#ab8900"
+    );
+    
+    private readonly ValourClient _client;
+    private readonly CacheService _cache;
+    
+    public EcoService(ValourClient client)
+    {
+        _client = client;
+        _cache = client.Cache;
+        SetupLogging(client.Logger, LogOptions);
+    }
+    
+    /// <summary>
+    /// Returns a list of global accounts that match the given name. Global accounts are the Valour Credit accounts.
+    /// </summary>
+    public async Task<EcoGlobalAccountSearchResult> SearchGlobalAccountsAsync(string name)
+    {
+        var node = await _client.NodeService.GetNodeForPlanetAsync(ISharedPlanet.ValourCentralId);
+        return (await node.GetJsonAsync<EcoGlobalAccountSearchResult>($"api/eco/accounts/byname/{HttpUtility.UrlEncode(name)}", true)).Data;
+    }
+    
+    /// <summary>
+    /// Returns all eco accounts that the client user has access to.
+    /// </summary>
+    /// <returns></returns>
+    public async Task<TaskResult<List<EcoAccount>>> FetchSelfEcoAccountsAsync()
+    {
+        return await _client.PrimaryNode.GetJsonAsync<List<EcoAccount>>("api/eco/accounts/self");
+    }
+    
+    public async Task<EcoAccount> GetSelfGlobalAccountAsync()
+    {
+        var planet = await _client.PlanetService.FetchPlanetAsync(ISharedPlanet.ValourCentralId);
+        var account = (await planet.Node.GetJsonAsync<EcoAccount>($"api/eco/accounts/self/global")).Data;
+
+        return _client.Cache.Sync(account);
+    }
+
+    /// <summary>
+    /// Returns the eco account with the given id.
+    /// The planet will be fetched.
+    /// </summary>
+    public async ValueTask<EcoAccount> FetchEcoAccountAsync(long id, long planetId, bool skipCache = false)
+    {
+        var planet = await _client.PlanetService.FetchPlanetAsync(planetId, skipCache);
+        return await FetchEcoAccountAsync(id, planet, skipCache);
+    }
+    
+    /// <summary>
+    /// Returns the eco account with the given id.
+    /// The planet must be provided.
+    /// </summary>
+    public async ValueTask<EcoAccount> FetchEcoAccountAsync(long id, Planet planet, bool skipCache = false)
+    {
+        if (!skipCache && _cache.EcoAccounts.TryGet(id, out var cached))
+            return cached;
+        
+        var item = (await planet.Node.GetJsonAsync<EcoAccount>($"api/eco/accounts/{id}")).Data;
+
+        return _cache.Sync(item);
+    }
+    
+    /// <summary>
+    /// Returns the transaction with the given id.
+    /// </summary>
+    public async ValueTask<Transaction> FetchTransactionAsync(string id)
+    {
+        var item = (await _client.PrimaryNode.GetJsonAsync<Transaction>($"api/eco/transactions/{id}")).Data;
+        return item;
+    }
+
+    /// <summary>
+    /// Sends the given transaction to be processed.
+    /// Will fetch the planet.
+    /// </summary>
+    public async ValueTask<TaskResult<Transaction>> SendTransactionAsync(Transaction trans)
+    {
+        var planet = await _client.PlanetService.FetchPlanetAsync(trans.PlanetId);
+        return await SendTransactionAsync(trans, planet);
+    }
+
+    /// <summary>
+    /// Sends the given transaction to be processed.
+    /// Planet must be provided.
+    /// </summary>
+    public async ValueTask<TaskResult<Transaction>> SendTransactionAsync(Transaction trans, Planet planet)
+    {
+        return await planet.Node.PostAsyncWithResponse<Transaction>("api/eco/transactions", trans);
+    } 
+    
+    /// <summary>
+    /// Returns the receipt for the given transaction id.
+    /// </summary>
+    public async ValueTask<EcoReceipt> FetchReceiptAsync(string id)
+    {
+        var item = (await _client.PrimaryNode.GetJsonAsync<EcoReceipt>($"api/eco/transactions/{id}/receipt")).Data;
+        return item;
+    }
+    
+    /// <summary>
+    /// Returns an engine for querying shared accounts on the given planet.
+    /// </summary>
+    public ModelQueryEngine<EcoAccount> GetSharedAccountQueryEngine(Planet planet) =>
+        new ModelQueryEngine<EcoAccount>(planet.Node, $"api/eco/accounts/planet/{planet.Id}/planet");
+    
+    /// <summary>
+    /// Returns an engine for querying user accounts on the given planet.
+    /// </summary>
+    public ModelQueryEngine<EcoAccountPlanetMember> GetUserAccountQueryEngine(Planet planet) =>
+        new ModelQueryEngine<EcoAccountPlanetMember>(planet.Node, $"api/eco/accounts/planet/{planet.Id}/member"); 
+    
+    /// <summary>
+    /// Returns a paged reader for querying shared accounts on the given planet.
+    /// </summary>
+    public PagedModelReader<EcoAccount> GetSharedAccountPagedReader(Planet planet, int pageSize = 50) =>
+        new PagedModelReader<EcoAccount>(planet.Node, $"api/eco/accounts/planet/{planet.Id}/planet", pageSize);
+
+    /// <summary>
+    /// Returns the currency with the given id.
+    /// The planet will be fetched.
+    /// </summary>
+    public async ValueTask<Currency> FetchCurrencyAsync(long id, long planetId, bool skipCache = false)
+    {
+        var planet = await _client.PlanetService.FetchPlanetAsync(planetId, skipCache);
+        return await FetchCurrencyAsync(id, planet, skipCache);
+    }
+
+    /// <summary>
+    /// Returns the currency with the given id.
+    /// Planet must be provided.
+    /// </summary>
+    public async ValueTask<Currency> FetchCurrencyAsync(long id, Planet planet, bool skipCache = false)
+    {
+        if (!skipCache && _cache.Currencies.TryGet(id, out var cached))
+            return cached;
+        
+        var item = (await _client.PrimaryNode.GetJsonAsync<Currency>($"api/eco/currencies/{id}")).Data;
+
+        return _cache.Sync(item);
+    }
+    
+    public ValueTask<Currency> FetchGlobalCurrencyAsync() =>
+        FetchCurrencyAsync(ISharedCurrency.ValourCreditsId, ISharedPlanet.ValourCentralId);
+
+    /// <summary>
+    /// Returns the currency for the given planet.
+    /// The planet will be fetched.
+    /// </summary>
+    public async ValueTask<Currency> FetchCurrencyByPlanetAsync(long planetId, bool skipCache = false)
+    {
+        var planet = await _client.PlanetService.FetchPlanetAsync(planetId, skipCache);
+        return await FetchCurrencyByPlanetAsync(planet);
+    }
+    
+    /// <summary>
+    /// Returns the currency for the given planet.
+    /// Planet must be provided.
+    /// </summary>
+    public async ValueTask<Currency> FetchCurrencyByPlanetAsync(Planet planet)
+    {
+        var item = (await planet.Node.GetJsonAsync<Currency>($"api/eco/currencies/byPlanet/{planet.Id}", true)).Data;
+
+        return _cache.Sync(item);
+    }
+    
+    /// <summary>
+    /// Returns all accounts the user can send to for a given planet id
+    /// </summary>
+    public async Task<List<EcoAccountSearchResult>> SearchSendableAccountsAsync(long planetId, long accountId, string filter = "")
+    {
+        var node = await _client.NodeService.GetNodeForPlanetAsync(planetId);
+
+        var request = new EcoPlanetAccountSearchRequest()
+        {
+            PlanetId = planetId,
+            AccountId = accountId,
+            Filter = filter
+        };
+        
+        var response = (await node.PostAsyncWithResponse<List<EcoAccountSearchResult>>($"api/eco/accounts/planet/canSend", request)).Data;
+        
+        for (int i = 0; i < response.Count; i++)
+        {
+            response[i].Account = _cache.Sync(response[i].Account);
+        }
+
+        return response;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/FriendService.cs b/Valour/Sdk/Services/FriendService.cs
new file mode 100644
index 000000000..967024889
--- /dev/null
+++ b/Valour/Sdk/Services/FriendService.cs
@@ -0,0 +1,280 @@
+using System.Web;
+using Valour.Sdk.Client;
+using Valour.Shared;
+using Valour.Shared.Models;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.Services;
+
+public class FriendService : ServiceBase
+{
+    /// <summary>
+    /// Run when there is a friend event
+    /// </summary>
+    public HybridEvent<FriendEventData> FriendsChanged;
+
+    /// <summary>
+    /// The friends of this client
+    /// </summary>
+    public readonly List<User> Friends = new();
+
+    /// <summary>
+    /// The fast lookup set for friends
+    /// </summary>
+    public readonly Dictionary<long, User> FriendLookup = new();
+    public readonly List<User> FriendRequests = new();
+    public readonly List<User> FriendsRequested = new ();
+    
+    private static readonly LogOptions LogOptions = new (
+	    "FriendService",
+	    "#036bfc",
+	    "#fc0356",
+	    "#fc8403"
+    );
+    
+    private readonly ValourClient _client;
+    private readonly CacheService _cache;
+    public FriendService(ValourClient client)
+    {
+	    _client = client;
+	    _cache = client.Cache;
+	    SetupLogging(client.Logger, LogOptions);
+    }
+    
+    /// <summary>
+    /// Fetches friend data from the server
+    /// </summary>
+    public async Task FetchesFriendsAsync()
+    {
+	    var data = await _client.Me.FetchFriendDataAsync();
+	    if (data is null)
+	    {
+		    LogError("Error loading friends.");
+		    return;
+	    }
+	    
+	    FriendRequests.Clear();
+	    FriendsRequested.Clear();
+
+	    foreach (var added in data.Added)
+		    FriendRequests.Add(added);
+
+	    foreach (var addedBy in data.AddedBy)
+		    FriendsRequested.Add(addedBy);
+
+	    Friends.Clear();
+	    FriendLookup.Clear();
+
+	    foreach (var req in FriendRequests)
+	    {
+		    if (FriendsRequested.Any(x => x.Id == req.Id))
+		    {
+			    Friends.Add(req);
+			    FriendLookup.Add(req.Id, req);
+		    }
+	    }
+
+	    foreach (var friend in Friends)
+	    {
+		    FriendRequests.RemoveAll(x => x.Id == friend.Id);
+		    FriendsRequested.RemoveAll(x => x.Id == friend.Id);
+	    }
+
+	    Log($"Loaded {Friends.Count} friends.");
+	    
+	    FriendsChanged?.Invoke(new FriendEventData()
+	    {
+		    User = null,
+		    Type = FriendEventType.FetchedAll
+	    });
+    }
+    
+    public void OnFriendEventReceived(FriendEventData eventData)
+    {
+        if (eventData.Type == FriendEventType.AddedMe)
+        {
+            // If we already had a friend request to them,
+            if (FriendsRequested.Any(x => x.Id == eventData.User.Id))
+            {
+                // Add as a friend
+                Friends.Add(eventData.User);
+            }
+            // otherwise,
+            else
+            {
+                // add to friend requests
+                FriendRequests.Add(eventData.User);
+            }
+        } 
+        else if (eventData.Type == FriendEventType.RemovedMe)
+        {
+            // If they were already a friend,
+            if (Friends.Any(x => x.Id == eventData.User.Id))
+            {
+                // remove them
+                Friends.RemoveAll(x => x.Id == eventData.User.Id);
+            }
+            // otherwise,
+            else
+            {
+                // remove from friend requests
+                FriendRequests.RemoveAll(x => x.Id == eventData.User.Id);
+            }
+        }
+        
+        FriendsChanged?.Invoke(eventData);
+    }
+
+    /// <summary>
+    /// Adds a friend
+    /// </summary>
+    public async Task<TaskResult<UserFriend>> AddFriendAsync(string nameAndTag)
+    {
+        var result = await _client.PrimaryNode.PostAsyncWithResponse<UserFriend>($"api/userfriends/add/{HttpUtility.UrlEncode(nameAndTag)}");
+
+        if (!result.Success)
+	        return result;
+        
+        var addedUser = await _client.UserService.FetchUserAsync(result.Data.FriendId);
+
+		// If we already had a friend request from them,
+		// add them to the friends list
+		var request = FriendRequests.FirstOrDefault(x => x.NameAndTag.Equals(nameAndTag, StringComparison.OrdinalIgnoreCase));
+        if (request is not null)
+        {
+            FriendRequests.Remove(request);
+			Friends.Add(addedUser);
+            FriendLookup.Add(addedUser.Id, addedUser);
+		}
+		// Otherwise, add this request to our request list
+		else
+		{
+            FriendsRequested.Add(addedUser);
+        }
+        
+		var eventData = new FriendEventData
+		{
+			User = addedUser,
+			Type = FriendEventType.AddedThem
+		};
+            
+		FriendsChanged?.Invoke(eventData);
+		
+        return result;
+    }
+
+	/// <summary>
+	/// Declines a friend request
+	/// </summary>
+	public async Task<TaskResult> DeclineFriendAsync(string nameAndTag)
+	{
+		var result = await _client.PrimaryNode.PostAsync($"api/userfriends/decline/{HttpUtility.UrlEncode(nameAndTag)}", null);
+
+		if (!result.Success)
+			return result;
+        
+        var declined = FriendRequests.FirstOrDefault(x => x.NameAndTag.ToLower() == nameAndTag.ToLower());
+        if (declined is not null)
+            FriendRequests.Remove(declined);
+        
+        var eventData = new FriendEventData
+		{
+			User = declined,
+			Type = FriendEventType.DeclinedThem
+		};
+        
+        FriendsChanged?.Invoke(eventData);
+
+		return result;
+	}
+
+	/// <summary>
+	/// Removes a friend :(
+	/// </summary>
+	public async Task<TaskResult> RemoveFriendAsync(string nameAndTag)
+    {
+        var result = await _client.PrimaryNode.PostAsync($"api/userfriends/remove/{HttpUtility.UrlEncode(nameAndTag)}", null);
+
+        if (!result.Success)
+			return result;
+        
+        FriendsRequested.RemoveAll(x => x.NameAndTag.ToLower() == nameAndTag.ToLower());
+        var friend = Friends.FirstOrDefault(x => x.NameAndTag.ToLower() == nameAndTag.ToLower());
+        if (friend is not null)
+        {
+            Friends.Remove(friend);
+            FriendLookup.Remove(friend.Id);
+
+            FriendRequests.Add(friend);
+		}
+
+        var eventData = new FriendEventData()
+        {
+	        User = friend,
+	        Type = FriendEventType.RemovedThem
+        };
+        
+        FriendsChanged?.Invoke(eventData);
+        
+        return result;
+    }
+
+	/// <summary>
+	/// Cancels a friend request
+	/// </summary>
+	public async Task<TaskResult> CancelFriendAsync(string nameAndTag)
+	{
+		var result = await _client.PrimaryNode.PostAsync($"api/userfriends/cancel/{HttpUtility.UrlEncode(nameAndTag)}", null);
+
+		if (!result.Success)
+			return result;
+		
+		var canceled = FriendsRequested.FirstOrDefault(x => x.NameAndTag.ToLower() == nameAndTag.ToLower());
+		if (canceled is not null)
+			FriendsRequested.Remove(canceled);
+		
+		var eventData = new FriendEventData
+		{
+			User = canceled,
+			Type = FriendEventType.CancelledThem
+		};
+		
+		FriendsChanged?.Invoke(eventData);
+
+		return result;
+	}
+
+	public async Task<List<User>> GetFriendsAsync(long userId)
+	{
+		var result = await _client.PrimaryNode.GetJsonAsync<List<User>>($"{ISharedUser.GetIdRoute(userId)}/friends");
+
+		for (int i = 0; i < result.Data.Count; i++)
+		{
+			var user = result.Data[i];
+			result.Data[i] = _cache.Sync(user);
+		}
+		
+		return result.Data;
+	}
+
+	public async Task<UserFriendData> FetchFriendDataAsync(long userId)
+	{
+		var result = await _client.PrimaryNode.GetJsonAsync<UserFriendData>($"{ISharedUser.GetIdRoute(userId)}/frienddata");
+		if (!result.Success)
+			return null;
+		
+		for (int i = 0; i < result.Data.Added.Count; i++)
+		{
+			var user = result.Data.Added[i];
+			result.Data.Added[i] = _cache.Sync(user);
+		}
+		
+		for (int i = 0; i < result.Data.AddedBy.Count; i++)
+		{
+			var user = result.Data.AddedBy[i];
+			result.Data.AddedBy[i] = _cache.Sync(user);
+		}
+		
+		return result.Data;
+	}
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/LoggingService.cs b/Valour/Sdk/Services/LoggingService.cs
new file mode 100644
index 000000000..8dc86d232
--- /dev/null
+++ b/Valour/Sdk/Services/LoggingService.cs
@@ -0,0 +1,54 @@
+namespace Valour.Sdk.Services;
+
+public class LoggingService
+{
+    private List<Action<string, string>> Loggers { get; set; } = new();
+    private List<Action<string, string, string>> ColorLoggers { get; set; } = new();
+
+    public LoggingService(bool addDefaultLogger = true)
+    {
+        if (addDefaultLogger)
+            Loggers.Add(DefaultLog);
+    }
+
+    private void DefaultLog(string prefix, string message)
+    {
+        Console.WriteLine($"[{prefix}] {message}");
+    }
+    
+    public void AddLogger(Action<string, string> logger)
+    {
+        Loggers.Add(logger);
+    }
+    
+    public void AddColorLogger(Action<string, string, string> logger)
+    {
+        ColorLoggers.Add(logger);
+    }
+    
+    public void Log(string prefix, string message, string color)
+    {
+        foreach (var logger in Loggers)
+        {
+            logger(prefix, message);
+        }
+        
+        foreach (var logger in ColorLoggers)
+        {
+            logger(prefix, message, color);
+        }
+    }
+    
+    public void Log<T>(string message, string color)
+    {
+        foreach (var logger in Loggers)
+        {
+            logger(typeof(T).Name, message);
+        }
+        
+        foreach (var logger in ColorLoggers)
+        {
+            logger(typeof(T).Name, message, color);
+        }
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/MessageService.cs b/Valour/Sdk/Services/MessageService.cs
new file mode 100644
index 000000000..630f8bff8
--- /dev/null
+++ b/Valour/Sdk/Services/MessageService.cs
@@ -0,0 +1,197 @@
+using Microsoft.AspNetCore.SignalR.Client;
+using Valour.Sdk.Client;
+using Valour.Sdk.Models.Messages.Embeds;
+using Valour.Sdk.Nodes;
+using Valour.Shared;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.Services;
+
+public class MessageService : ServiceBase
+{
+    /// <summary>
+    /// Run when a message is received
+    /// </summary>
+    public HybridEvent<Message> MessageReceived;
+    
+    /// <summary>
+    /// Run when a message is edited
+    /// </summary>
+    public HybridEvent<Message> MessageEdited;
+
+    /// <summary>
+    /// Run when a planet is deleted
+    /// </summary>
+    public HybridEvent<Message> MessageDeleted;
+    
+    /// <summary>
+    /// Run when a personal embed update is received
+    /// </summary>
+    public HybridEvent<PersonalEmbedUpdate> PersonalEmbedUpdate;
+
+    /// <summary>
+    /// Run when a channel embed update is received
+    /// </summary>
+    public HybridEvent<ChannelEmbedUpdate> ChannelEmbedUpdate;
+    
+    private readonly LogOptions _logOptions = new(
+        "MessageService",
+        "#3381a3",
+        "#a3333e",
+        "#a39433"
+    );
+    
+    private readonly ValourClient _client;
+    private readonly CacheService _cache;
+    
+    public MessageService(ValourClient client)
+    {
+        _client = client;
+        _cache = client.Cache;
+        SetupLogging(client.Logger, _logOptions);
+        
+        _client.NodeService.NodeAdded += HookHubEvents;
+    }
+    
+    public async ValueTask<Message> FetchMessageAsync(long id, bool skipCache = false)
+    {
+        if (!skipCache && _client.Cache.Messages.TryGet(id, out var cached))
+            return cached;
+        
+        var response = await _client.PrimaryNode.GetJsonAsync<Message>($"api/message/{id}");
+
+        return _client.Cache.Sync(response.Data);
+    }
+    
+    public async ValueTask<Message> FetchMessageAsync(long id, Planet planet, bool skipCache = false)
+    {
+        if (!skipCache && _client.Cache.Messages.TryGet(id, out var cached))
+            return cached;
+        
+        var response = await (planet?.Node ?? _client.PrimaryNode).GetJsonAsync<Message>($"api/message/{id}");
+
+        return _client.Cache.Sync(response.Data);
+    }
+    
+    /// <summary>
+    /// Sends a message
+    /// </summary>
+    public Task<TaskResult<Message>> SendMessage(Message message)
+        => message.PostAsync();
+    
+    /// <summary>
+    /// Ran when a message is recieved
+    /// </summary>
+    private void OnPlanetMessageReceived(Message message)
+    {
+        Log($"[{message.Node?.Name}]: Received planet message {message.Id} for channel {message.ChannelId}");
+        if (message.ReplyTo is not null)
+        {
+            message.ReplyTo = _cache.Sync(message.ReplyTo);
+        }
+        
+        var cached = _cache.Sync(message);
+
+        MessageReceived?.Invoke(cached);
+        
+        if (_cache.Channels.TryGet(message.ChannelId, out var channel))
+        {
+            channel.NotifyMessageReceived(message);
+        }
+    }
+    
+    /// <summary>
+    /// Ran when a message is edited
+    /// </summary>
+    private void OnPlanetMessageEdited(Message message)
+    {
+        Log($"[{message.Node?.Name}]: Received planet message edit {message.Id} for channel {message.ChannelId}");
+        if (message.ReplyTo is not null)
+        {
+            message.ReplyTo = _cache.Sync(message.ReplyTo);
+        }
+
+        var cached = _cache.Sync(message);
+        
+        MessageEdited?.Invoke(cached);
+        
+        if (_cache.Channels.TryGet(message.ChannelId, out var channel))
+        {
+            channel.NotifyMessageEdited(message);
+        }
+    }
+    
+    /// <summary>
+    /// Ran when a message is recieved
+    /// </summary>
+    private void OnDirectMessageReceived(Message message)
+    {
+        Log($"[{message.Node?.Name}]: Received direct message {message.Id} for channel {message.ChannelId}");
+        
+        if (message.ReplyTo is not null)
+        {
+            message.ReplyTo = _cache.Sync(message.ReplyTo);
+        }
+        
+        var cached = _cache.Sync(message);
+        
+        MessageReceived?.Invoke(cached);
+        
+        if (_cache.Channels.TryGet(message.ChannelId, out var channel))
+        {
+            channel.NotifyMessageReceived(message);
+        }
+    }
+    
+    /// <summary>
+    /// Ran when a message is edited
+    /// </summary>
+    private void OnDirectMessageEdited(Message message)
+    {
+        Log($"[{message.Node?.Name}]: Received direct message edit {message.Id} for channel {message.ChannelId}");
+        if (message.ReplyTo is not null)
+        {
+            message.ReplyTo = _cache.Sync(message.ReplyTo);
+        }
+        
+        var cached = _cache.Sync(message);
+        
+        MessageEdited?.Invoke(cached);
+        
+        if (_cache.Channels.TryGet(message.ChannelId, out var channel))
+        {
+            channel.NotifyMessageEdited(message);
+        }
+    }
+
+    private void OnMessageDeleted(Message message)
+    {
+        MessageDeleted?.Invoke(message);
+        
+        if (_cache.Channels.TryGet(message.ChannelId, out var channel))
+        {
+            channel.NotifyMessageDeleted(message);
+        }
+    }
+    
+    private void OnPersonalEmbedUpdate(PersonalEmbedUpdate update)
+    {
+        PersonalEmbedUpdate?.Invoke(update);
+    }
+
+    private void OnChannelEmbedUpdate(ChannelEmbedUpdate update)
+    {
+        ChannelEmbedUpdate?.Invoke(update);
+    }
+    
+    private void HookHubEvents(Node node)
+    {
+        node.HubConnection.On<Message>("Relay", OnPlanetMessageReceived);
+        node.HubConnection.On<Message>("RelayEdit", OnPlanetMessageEdited);
+        node.HubConnection.On<Message>("RelayDirect", OnDirectMessageReceived);
+        node.HubConnection.On<Message>("RelayDirectEdit", OnDirectMessageEdited);
+        node.HubConnection.On<Message>("DeleteMessage", _client.MessageService.OnMessageDeleted);
+        node.HubConnection.On<PersonalEmbedUpdate>("Personal-Embed-Update", OnPersonalEmbedUpdate);
+        node.HubConnection.On<ChannelEmbedUpdate>("Channel-Embed-Update", OnChannelEmbedUpdate);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/NodeService.cs b/Valour/Sdk/Services/NodeService.cs
new file mode 100644
index 000000000..0623b41eb
--- /dev/null
+++ b/Valour/Sdk/Services/NodeService.cs
@@ -0,0 +1,177 @@
+using Valour.Sdk.Client;
+using Valour.Sdk.Nodes;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.Services;
+
+public class NodeService : ServiceBase
+{
+    public HybridEvent<Node> NodeAdded;
+    public HybridEvent<Node> NodeRemoved;
+    public HybridEvent<Node> NodeReconnected;
+
+    public readonly IReadOnlyList<Node> Nodes;
+    private readonly List<Node> _nodes = new();
+
+    public readonly IReadOnlyDictionary<long, string> PlanetToNodeName;
+    private readonly Dictionary<long, string> _planetToNodeName = new();
+
+    public readonly IReadOnlyDictionary<string, Node> NameToNode;
+    private readonly Dictionary<string, Node> _nameToNode = new();
+    
+    private readonly ValourClient _client;
+    
+    private static readonly LogOptions LogOptions = new (
+        "NodeService",
+        "#036bfc",
+        "#fc0356",
+        "#fc8403"
+    );
+    
+    public NodeService(ValourClient client)
+    {
+        _client = client;
+        
+        Nodes = _nodes;
+        PlanetToNodeName = _planetToNodeName;
+        NameToNode = _nameToNode;
+        
+        SetupLogging(client.Logger, LogOptions);
+    }
+    
+    public async Task SetupPrimaryNodeAsync()
+    {
+        string nodeName = null;
+
+        do
+        {
+            // Get primary node identity
+            var nodeNameResponse = await _client.Http.GetAsync("api/node/name");
+            var msg = await nodeNameResponse.Content.ReadAsStringAsync();
+            if (!nodeNameResponse.IsSuccessStatusCode)
+            {
+                LogError("Failed to get primary node name... trying again in three seconds. Network issues? \n \n" + msg);
+                await Task.Delay(3000);
+            }
+            else
+            {
+                nodeName = msg;
+            }
+        } while (nodeName is null);
+        
+        // Initialize primary node
+        _client.PrimaryNode = new Node(_client);
+        await _client.PrimaryNode.InitializeAsync(nodeName, true);
+    }
+    
+    
+    /// <summary>
+    /// Returns the node that a planet is known to be on,
+    /// but will not reach out to the server to find new ones
+    /// </summary>
+    public Node GetKnownByPlanet(long planetId)
+    {
+        _planetToNodeName.TryGetValue(planetId, out string name);
+        if (name is null)
+            return null;
+
+        // If we know the node name but don't have it set up, we can set it up now
+        _nameToNode.TryGetValue(name, out Node node);
+        return node;
+    }
+
+    /// <summary>
+    /// Returns the node with the given name
+    /// </summary>
+    public async ValueTask<Node> GetByName(string name)
+    {
+        // Do we already have the node?
+        if (_nameToNode.TryGetValue(name, out var node))
+            return node;
+        
+        // If not, create it and link it
+        node = new Node(_client);
+        await node.InitializeAsync(name);
+        
+        // TODO: We have a master list of node names so we can probably do a sanity check here
+        
+        return node;
+    }
+
+    /// <summary>
+    /// Returns the node with the given name, and sets the location of a planet
+    /// Used for healing node locations after bad requests
+    /// </summary>
+    public async Task<Node> GetNodeAndSetPlanetLocation(string name, long? planetId)
+    {
+        if (name is null)
+            return null;
+        
+        var node = await GetByName(name);
+
+        if (planetId is not null)
+        {
+            _planetToNodeName[planetId.Value] = name;
+
+            if (_client.Cache.Planets.TryGet(planetId.Value, out var planet))
+                planet.SetNode(node);
+        }
+
+        return node;
+    }
+
+    public void RegisterNode(Node node)
+    {
+        _nameToNode[node.Name] = node;
+
+        if (_nodes.All(x => x.Name != node.Name))
+            _nodes.Add(node);
+    }
+    
+    public void SetKnownByPlanet(long planetId, string nodeName)
+    {
+        _planetToNodeName[planetId] = nodeName;
+    }
+
+    public async ValueTask<Node> GetNodeForPlanetAsync(long planetId)
+    {
+            
+        _planetToNodeName.TryGetValue(planetId, out string name);
+
+        // Do we already have the node?
+        if (name is null)
+        {
+            // If not, ask current node where the planet is located
+            var response = await _client.PrimaryNode.GetAsync($"api/node/planet/{planetId}");
+
+            // We failed to find the planet in a node
+            if (!response.Success)
+                return null;
+
+            // If we succeeded, wrap the response in a node object
+            name = response.Data.Trim();
+        }
+            
+        NameToNode.TryGetValue(name, out var node);
+
+        // If we don't already know about this node, create it and link it
+        if (node is null) {
+
+            node = new Node(_client);
+            await node.InitializeAsync(name);
+        }
+                
+        // Set planet to node
+        _planetToNodeName[planetId] = name;
+
+        return node;
+    }
+
+    public void CheckConnections()
+    {
+        foreach (var node in Nodes)
+        {
+            node.CheckConnection();
+        }
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/NotificationService.cs b/Valour/Sdk/Services/NotificationService.cs
new file mode 100644
index 000000000..1a4c45b52
--- /dev/null
+++ b/Valour/Sdk/Services/NotificationService.cs
@@ -0,0 +1,132 @@
+using Valour.Sdk.Client;
+using Valour.Shared;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.Services;
+
+public class NotificationService
+{
+    /// <summary>
+    /// Run when a notification is received
+    /// </summary>
+    public HybridEvent<Notification> NotificationReceived;
+
+    /// <summary>
+    /// Run when notifications are cleared
+    /// </summary>
+    public HybridEvent NotificationsCleared;
+    
+    /// <summary>
+    /// Pain and suffering for thee
+    /// </summary>
+    public IReadOnlyList<Notification> UnreadNotifications { get; private set; }
+    private List<Notification> _unreadNotifications = new();
+    
+    // Needs to be here to be used as virtualized, unfortunately
+    public List<Notification> GetUnreadInternal() => _unreadNotifications;
+    
+    /// <summary>
+    /// A set from the source of notifications to the notification.
+    /// Used for extremely efficient lookups.
+    /// </summary>
+    public IReadOnlyDictionary<long, Notification> UnreadNotificationsLookupBySource { get; private set; }
+    private Dictionary<long, Notification> _unreadNotificationsLookupBySource = new();
+    
+    private readonly ValourClient _client;
+    
+    public NotificationService(ValourClient client)
+    {
+        _client = client;
+        
+        UnreadNotifications = _unreadNotifications;
+        UnreadNotificationsLookupBySource = _unreadNotificationsLookupBySource;
+    }
+    
+    public async Task LoadUnreadNotificationsAsync()
+    {
+        var response = await _client.PrimaryNode.GetJsonAsync<List<Notification>>($"api/notifications/self/unread/all");
+
+        if (!response.Success)
+            return;
+
+        var notifications = response.Data;
+
+        _unreadNotifications.Clear();
+        _unreadNotificationsLookupBySource.Clear();
+        
+        // Add to cache
+        foreach (var notification in notifications)
+        {
+            var cached = _client.Cache.Sync(notification);
+            
+            // Only add if unread
+            if (notification.TimeRead is not null)
+                continue;
+            
+            _unreadNotifications.Add(cached);
+            
+            if (cached.SourceId is not null)
+                _unreadNotificationsLookupBySource.Add(notification.SourceId!.Value, notification);
+        }
+    }
+
+    public async Task<TaskResult> MarkNotificationRead(Notification notification, bool value)
+    {
+        var result = await _client.PrimaryNode.PostAsync($"api/notifications/self/{notification.Id}/read/{value}", null);
+        return result;
+    }
+
+    public async Task<TaskResult> ClearNotificationsAsync()
+    {
+        var result = await _client.PrimaryNode.PostAsync("api/notifications/self/clear", null);
+        return result;
+    }
+    
+    public int GetPlanetNotifications(long planetId)
+    {
+        return UnreadNotifications.Count(x => x.PlanetId == planetId);
+    }
+
+    public int GetChannelNotifications(long channelId)
+    {
+        return UnreadNotifications.Count(x => x.ChannelId == channelId);
+    }
+
+    public void OnNotificationReceived(Notification notification)
+    {
+        var cached = _client.Cache.Sync(notification);   
+        
+        if (cached.TimeRead is null)
+        {
+            if (!_unreadNotifications.Contains(cached))
+                _unreadNotifications.Add(cached);
+
+            if (cached.SourceId is not null)
+            {
+                _unreadNotificationsLookupBySource[cached.SourceId.Value] = cached;
+            }
+        }
+        else
+        {
+            _unreadNotifications.RemoveAll(x => x.Id == cached.Id);
+            if (cached.SourceId is not null)
+            {
+                _unreadNotificationsLookupBySource.Remove(cached.SourceId.Value);
+            }
+        }
+        
+        NotificationReceived?.Invoke(cached);
+    }
+
+    /// <summary>
+    /// Triggered by the server when notifications are cleared,
+    /// so that cross-device notifications are synced
+    /// </summary>
+    public void OnNotificationsCleared()
+    {
+        _unreadNotifications.Clear();
+        _unreadNotificationsLookupBySource.Clear();
+        
+        NotificationsCleared?.Invoke();
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/OauthService.cs b/Valour/Sdk/Services/OauthService.cs
new file mode 100644
index 000000000..58f074fc3
--- /dev/null
+++ b/Valour/Sdk/Services/OauthService.cs
@@ -0,0 +1,31 @@
+using Valour.Sdk.Client;
+using Valour.Shared.Authorization;
+
+namespace Valour.Sdk.Services;
+
+public class OauthService : ServiceBase
+{
+    private readonly LogOptions _logOptions = new(
+        "OauthService",
+        "#3381a3",
+        "#a3333e",
+        "#a39433"
+    );
+    
+    private readonly ValourClient _client;
+
+    public OauthService(ValourClient client)
+    {
+        _client = client;
+        SetupLogging(_client.Logger, _logOptions);
+    }
+    
+    public async Task<List<OauthApp>> FetchMyOauthAppAsync() =>
+        (await _client.PrimaryNode.GetJsonAsync<List<OauthApp>>($"{_client.Me.IdRoute}/apps")).Data;
+
+    public async Task<OauthApp> FetchAppAsync(long id) =>
+        (await _client.PrimaryNode.GetJsonAsync<OauthApp>($"api/oauth/app/{id}")).Data;
+
+    public async Task<PublicOauthAppData> FetchAppPublicDataAsync(long id) =>
+        (await _client.PrimaryNode.GetJsonAsync<PublicOauthAppData>($"api/oauth/app/public/{id}")).Data;
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/PermissionService.cs b/Valour/Sdk/Services/PermissionService.cs
new file mode 100644
index 000000000..ce1a4241b
--- /dev/null
+++ b/Valour/Sdk/Services/PermissionService.cs
@@ -0,0 +1,51 @@
+using Valour.Sdk.Client;
+using Valour.Sdk.ModelLogic;
+using Valour.Shared.Models;
+
+namespace Valour.Sdk.Services;
+
+public class PermissionService : ServiceBase
+{
+    private static readonly LogOptions LogOptions = new(
+        "PermissionService",
+        "#0083ab",
+        "#ab0055",
+        "#ab8900"
+    );
+    
+    private readonly ValourClient _client;
+    private readonly CacheService _cache;
+    
+    public PermissionService(ValourClient client)
+    {
+        _client = client;
+        _cache = client.Cache;
+        SetupLogging(client.Logger, LogOptions);
+    }
+    
+    public async ValueTask<PermissionsNode> FetchPermissionsNodeAsync(PermissionsNodeKey key, long planetId, bool skipCache = false)
+    {
+        var planet = await _client.PlanetService.FetchPlanetAsync(planetId, skipCache);
+        return await FetchPermissionsNodeAsync(key, planet, skipCache);
+    }
+    
+    public async ValueTask<PermissionsNode> FetchPermissionsNodeAsync(PermissionsNodeKey key, Planet planet, bool skipCache = false)
+    {
+        if (!skipCache && 
+            _cache.PermNodeKeyToId.TryGetValue(key, out var id) &&
+            _cache.PermissionsNodes.TryGet(id, out var cached))
+            return cached;
+        
+        var permNode = (await planet.Node.GetJsonAsync<PermissionsNode>(
+            ISharedPermissionsNode.GetIdRoute(key.TargetId, key.RoleId, key.TargetType), 
+            true)).Data;
+        
+        return _cache.Sync(permNode);
+    }
+    
+    public async Task<List<PermissionsNode>> FetchPermissionsNodesByRoleAsync(long roleId, Planet planet)
+    {
+        var permissionNodes = (await planet.Node.GetJsonAsync<List<PermissionsNode>>($"{ISharedPlanetRole.GetIdRoute(roleId)}/nodes")).Data;
+        return permissionNodes.SyncAll(_cache);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/PlanetService.cs b/Valour/Sdk/Services/PlanetService.cs
new file mode 100644
index 000000000..800a91420
--- /dev/null
+++ b/Valour/Sdk/Services/PlanetService.cs
@@ -0,0 +1,506 @@
+using System.Diagnostics;
+using System.Text.Json;
+using Microsoft.AspNetCore.SignalR.Client;
+using Valour.Sdk.Client;
+using Valour.Sdk.ModelLogic;
+using Valour.Sdk.Nodes;
+using Valour.Shared;
+using Valour.Shared.Models;
+using Valour.Shared.Utilities;
+
+namespace Valour.Sdk.Services;
+
+public class PlanetService : ServiceBase
+{
+    /// <summary>
+    /// Run when a planet connection opens
+    /// </summary>
+    public HybridEvent<Planet> PlanetConnected;
+
+    /// <summary>
+    /// Run when SignalR closes a planet
+    /// </summary>
+    public HybridEvent<Planet> PlanetDisconnected;
+
+    /// <summary>
+    /// Run when a planet is joined
+    /// </summary>
+    public HybridEvent<Planet> PlanetJoined;
+
+    /// <summary>
+    /// Run when the joined planets list is updated
+    /// </summary>
+    public HybridEvent JoinedPlanetsUpdated;
+
+    /// <summary>
+    /// Run when a planet is left
+    /// </summary>
+    public HybridEvent<Planet> PlanetLeft;
+
+    /// <summary>
+    /// The planets this client has joined
+    /// </summary>
+    public readonly IReadOnlyList<Planet> JoinedPlanets;
+
+    private readonly List<Planet> _joinedPlanets = new();
+
+    /// <summary>
+    /// Currently opened planets
+    /// </summary>
+    public readonly IReadOnlyList<Planet> ConnectedPlanets;
+
+    private readonly List<Planet> _connectedPlanets = new();
+
+    /// <summary>
+    /// Lookup for opened planets by id
+    /// </summary>
+    public readonly IReadOnlyDictionary<long, Planet> ConnectedPlanetsLookup;
+
+    private readonly Dictionary<long, Planet> _connectedPlanetsLookup = new();
+
+    /// <summary>
+    /// A set of locks used to prevent planet connections from closing automatically
+    /// </summary>
+    public readonly IReadOnlyDictionary<string, long> PlanetLocks;
+
+    private readonly Dictionary<string, long> _planetLocks = new();
+
+    private readonly LogOptions _logOptions = new(
+        "PlanetService",
+        "#3381a3",
+        "#a3333e",
+        "#a39433"
+    );
+
+    private readonly ValourClient _client;
+
+    public PlanetService(ValourClient client)
+    {
+        _client = client;
+
+        // Add victor dummy member
+        _client.Cache.PlanetMembers.PutReplace(long.MaxValue, new PlanetMember()
+        {
+            Nickname = "Victor",
+            Id = long.MaxValue,
+            MemberAvatar = "./_content/Valour.Client/media/logo/logo-256.webp"
+        });
+
+        // Setup readonly collections
+        JoinedPlanets = _joinedPlanets;
+        ConnectedPlanets = _connectedPlanets;
+        PlanetLocks = _planetLocks;
+        ConnectedPlanetsLookup = _connectedPlanetsLookup;
+
+        // Setup logging
+        SetupLogging(client.Logger, _logOptions);
+
+        // Setup reconnect logic
+        _client.NodeService.NodeReconnected += OnNodeReconnect;
+        _client.NodeService.NodeAdded += HookHubEvents;
+    }
+
+    /// <summary>
+    /// Retrieves and returns a client planet by requesting from the server
+    /// </summary>
+    public async ValueTask<Planet> FetchPlanetAsync(long id, bool skipCache = false)
+    {
+        if (!skipCache && _client.Cache.Planets.TryGet(id, out var cached))
+            return cached;
+
+        var planet = (await _client.PrimaryNode.GetJsonAsync<Planet>($"api/planets/{id}")).Data;
+
+        await planet.EnsureReadyAsync();
+
+        return _client.Cache.Sync(planet);
+    }
+
+    /// <summary>
+    /// Returns the invite for the given invite code (id)
+    /// </summary>
+    public async Task<PlanetInvite> FetchInviteAsync(string code, bool skipCache = false)
+    {
+        if (_client.Cache.PlanetInvites.TryGet(code, out var cached))
+            return cached;
+
+        var invite = (await _client.PrimaryNode.GetJsonAsync<PlanetInvite>(ISharedPlanetInvite.GetIdRoute(code))).Data;
+
+        return _client.Cache.Sync(invite);
+    }
+
+    public async Task<InviteScreenModel> FetchInviteScreenData(string code) =>
+        (await _client.PrimaryNode.GetJsonAsync<InviteScreenModel>(
+            $"{ISharedPlanetInvite.BaseRoute}/{code}/screen")).Data;
+
+    /// <summary>
+    /// Fetches all planets that the user has joined from the server
+    /// </summary>
+    public async Task<TaskResult> FetchJoinedPlanetsAsync()
+    {
+        var response = await _client.PrimaryNode.GetJsonAsync<List<Planet>>($"api/users/me/planets");
+        if (!response.Success)
+            return response.WithoutData();
+
+        var planets = response.Data;
+
+        _joinedPlanets.Clear();
+
+        planets.SyncAll(_client.Cache);
+
+        // Add to cache
+        foreach (var planet in planets)
+        {
+            _joinedPlanets.Add(planet);
+        }
+
+        JoinedPlanetsUpdated?.Invoke();
+
+        return TaskResult.SuccessResult;
+    }
+
+    /// <summary>
+    /// Returns if the given planet is open
+    /// </summary>
+    public bool IsPlanetConnected(Planet planet) =>
+        ConnectedPlanets.Any(x => x.Id == planet.Id);
+
+    /// <summary>
+    /// Opens a planet and prepares it for use
+    /// </summary>
+    public Task<TaskResult> TryOpenPlanetConnection(long planetId, string key)
+    {
+        if (!_client.Cache.Planets.TryGet(planetId, out var planet))
+        {
+            return Task.FromResult(TaskResult.FromFailure("Planet not found"));
+        }
+
+        return TryOpenPlanetConnection(planet, key);
+    }
+
+    /// <summary>
+    /// Opens a planet and prepares it for use
+    /// </summary>
+    public async Task<TaskResult> TryOpenPlanetConnection(Planet planet, string key)
+    {
+        // Cannot open null
+        if (planet is null)
+            return TaskResult.FromFailure("Planet is null");
+
+        if (PlanetLocks.ContainsKey(key))
+        {
+            _planetLocks[key] = planet.Id;
+        }
+        else
+        {
+            // Add lock
+            AddPlanetLock(key, planet.Id);
+        }
+
+        // Already open
+        if (ConnectedPlanets.Contains(planet))
+            return TaskResult.SuccessResult;
+
+        // Mark as opened
+        _connectedPlanets.Add(planet);
+        _connectedPlanetsLookup[planet.Id] = planet;
+
+        Log($"Opening planet {planet.Name} ({planet.Id})");
+
+        var sw = new Stopwatch();
+
+        sw.Start();
+
+        // Get node for planet
+        var node = await _client.NodeService.GetNodeForPlanetAsync(planet.Id);
+
+        List<Task> tasks = new();
+
+        // Joins SignalR group
+        var result = await node.HubConnection.InvokeAsync<TaskResult>("JoinPlanet", planet.Id);
+
+        if (!result.Success)
+        {
+            LogError(result.Message);
+            return result;
+        }
+
+        Log(result.Message);
+
+        // Load roles early for cached speed
+        await planet.LoadRolesAsync();
+
+        // Load member data early for the same reason (speed)
+        tasks.Add(planet.FetchMemberDataAsync());
+
+        // Load channels
+        tasks.Add(planet.FetchChannelsAsync());
+
+        // Load permissions nodes
+        tasks.Add(planet.FetchPermissionsNodesAsync());
+
+        // requesting/loading the data does not require data from other requests/types
+        // so just await them all, instead of one by one
+        await Task.WhenAll(tasks);
+
+        sw.Stop();
+
+        Log($"Time to open this Planet: {sw.ElapsedMilliseconds}ms");
+
+        // Log success
+        Log($"Joined SignalR group for planet {planet.Name} ({planet.Id})");
+
+        PlanetConnected?.Invoke(planet);
+
+        return TaskResult.SuccessResult;
+    }
+
+    /// <summary>
+    /// Closes a SignalR connection to a planet
+    /// </summary>
+    public Task<TaskResult> TryClosePlanetConnection(long planetId, string key, bool force = false)
+    {
+        if (!_client.Cache.Planets.TryGet(planetId, out var planet))
+        {
+            return Task.FromResult(TaskResult.FromFailure("Planet not found"));
+        }
+
+        return TryClosePlanetConnection(planet, key, force);
+    }
+
+    /// <summary>
+    /// Closes a SignalR connection to a planet
+    /// </summary>
+    public async Task<TaskResult> TryClosePlanetConnection(Planet planet, string key, bool force = false)
+    {
+        if (!force)
+        {
+            var lockResult = RemovePlanetLock(key);
+            if (lockResult == ConnectionLockResult.Locked)
+            {
+                return TaskResult.FromFailure("Planet is locked by other keys.");
+            }
+            // If for some reason our key isn't actually there
+            // (shouldn't happen, but just in case)
+            else if (lockResult == ConnectionLockResult.NotFound)
+            {
+                if (_planetLocks.Values.Any(x => x == planet.Id))
+                {
+                    return TaskResult.FromFailure("Planet is locked by other keys.");
+                }
+            }
+        }
+
+        // Already closed
+        if (!ConnectedPlanets.Contains(planet))
+            return TaskResult.SuccessResult;
+
+        // Close connection
+        await planet.Node.HubConnection.SendAsync("LeavePlanet", planet.Id);
+
+        // Remove from list
+        _connectedPlanets.Remove(planet);
+        _connectedPlanetsLookup.Remove(planet.Id);
+
+        Log($"Left SignalR group for planet {planet.Name} ({planet.Id})");
+
+        // Invoke event
+        PlanetDisconnected?.Invoke(planet);
+
+        return TaskResult.SuccessResult;
+    }
+
+    /// <summary>
+    /// Prevents a planet from closing connections automatically.
+    /// Key is used to allow multiple locks per planet.
+    /// </summary>
+    private void AddPlanetLock(string key, long planetId)
+    {
+        _planetLocks[key] = planetId;
+
+        Log($"Planet lock {key} added for {planetId}");
+    }
+
+    /// <summary>
+    /// Removes the lock for a planet.
+    /// Returns if there are any locks left for the planet.
+    /// </summary>
+    private ConnectionLockResult RemovePlanetLock(string key)
+    {
+        if (_planetLocks.TryGetValue(key, out var planetId))
+        {
+            Log($"Planet lock {key} removed for {planetId}");
+            _planetLocks.Remove(key);
+            return _planetLocks.Any(x => x.Value == planetId)
+                ? ConnectionLockResult.Locked
+                : ConnectionLockResult.Unlocked;
+        }
+
+        return ConnectionLockResult.NotFound;
+    }
+
+    /// <summary>
+    /// Adds a planet to the joined planets list and invokes the event.
+    /// </summary>
+    public void AddJoinedPlanet(Planet planet)
+    {
+        _joinedPlanets.Add(planet);
+        PlanetJoined?.Invoke(planet);
+        JoinedPlanetsUpdated?.Invoke();
+    }
+
+    /// <summary>
+    /// Removes a planet from the joined planets list and invokes the event.
+    /// </summary>
+    public void RemoveJoinedPlanet(Planet planet)
+    {
+        _joinedPlanets.Remove(planet);
+
+        PlanetLeft?.Invoke(planet);
+        JoinedPlanetsUpdated?.Invoke();
+    }
+
+    public async Task<TaskResult<PlanetMember>> JoinPlanetAsync(long planetId)
+    {
+        var planet = await FetchPlanetAsync(planetId);
+        return await JoinPlanetAsync(planet);
+    }
+
+    /// <summary>
+    /// Attempts to join the given planet
+    /// </summary>
+    public async Task<TaskResult<PlanetMember>> JoinPlanetAsync(Planet planet)
+    {
+        var result = await _client.PrimaryNode.PostAsyncWithResponse<PlanetMember>($"api/planets/{planet.Id}/discover");
+
+        if (result.Success)
+        {
+            AddJoinedPlanet(planet);
+        }
+
+        return result;
+    }
+
+    public Task<TaskResult<PlanetMember>> JoinPlanetAsync(long planetId, string inviteCode)
+    {
+        return _client.PrimaryNode.PostAsyncWithResponse<PlanetMember>(
+            $"api/planets/{planetId}/join?inviteCode={inviteCode}");
+    }
+
+    /// <summary>
+    /// Attempts to leave the given planet
+    /// </summary>
+    public async Task<TaskResult> LeavePlanetAsync(Planet planet)
+    {
+        // Get member
+        var result = await planet.MyMember.DeleteAsync();
+
+        if (result.Success)
+            RemoveJoinedPlanet(planet);
+
+        return result;
+    }
+
+    public void SetJoinedPlanets(List<Planet> planets)
+    {
+        _joinedPlanets.Clear();
+        _joinedPlanets.AddRange(planets);
+        JoinedPlanetsUpdated?.Invoke();
+    }
+
+    public async Task<List<PlanetListInfo>> FetchDiscoverablePlanetsAsync()
+    {
+        var response = await _client.PrimaryNode.GetJsonAsync<List<PlanetListInfo>>($"api/planets/discoverable");
+        if (!response.Success)
+            return new List<PlanetListInfo>();
+        
+        return response.Data;
+    }
+
+    public async ValueTask<PlanetRole> FetchRoleAsync(long id, long planetId, bool skipCache = false)
+    {
+        var planet = await FetchPlanetAsync(planetId, skipCache);
+        return await FetchRoleAsync(id, planet, skipCache);
+    }
+
+    public async ValueTask<PlanetRole> FetchRoleAsync(long id, Planet planet, bool skipCache = false)
+    {
+        if (!skipCache && _client.Cache.PlanetRoles.TryGet(id, out var cached))
+            return cached;
+
+        var role = (await planet.Node.GetJsonAsync<PlanetRole>($"{ISharedPlanetRole.BaseRoute}/{id}")).Data;
+
+        return _client.Cache.Sync(role);
+    }
+
+    public async Task<Dictionary<long, int>> FetchRoleMembershipCountsAsync(long planetId)
+    {
+        var planet = await FetchPlanetAsync(planetId);
+        return await FetchRoleMembershipCountsAsync(planet);
+    }
+
+    public async Task<Dictionary<long, int>> FetchRoleMembershipCountsAsync(Planet planet)
+    {
+        var response = await planet.Node.GetJsonAsync<Dictionary<long, int>>($"{planet.IdRoute}/roles/counts");
+        return response.Data;
+    }
+
+    public async ValueTask<PlanetMember> FetchMemberByUserAsync(long userId, long planetId, bool skipCache = false)
+    {
+        var planet = await FetchPlanetAsync(planetId, skipCache);
+        return await FetchMemberByUserAsync(userId, planet, skipCache);
+    }
+
+    public async ValueTask<PlanetMember> FetchMemberByUserAsync(long userId, Planet planet, bool skipCache = false)
+    {
+        var key = new PlanetMemberKey(userId, planet.Id);
+
+        if (!skipCache && _client.Cache.MemberKeyToId.TryGetValue(key, out var id) &&
+            _client.Cache.PlanetMembers.TryGet(id, out var cached))
+            return cached;
+
+        var member =
+            (await planet.Node.GetJsonAsync<PlanetMember>(
+                $"{ISharedPlanetMember.BaseRoute}/byuser/{planet.Id}/{userId}", true)).Data;
+
+        return _client.Cache.Sync(member);
+    }
+
+    public async ValueTask<PlanetMember> FetchMemberAsync(long id, long planetId, bool skipCache = false)
+    {
+        var planet = await FetchPlanetAsync(planetId, skipCache);
+        return await FetchMemberAsync(id, planet, skipCache);
+    }
+
+    public async ValueTask<PlanetMember> FetchMemberAsync(long id, Planet planet, bool skipCache = false)
+    {
+        if (!skipCache && _client.Cache.PlanetMembers.TryGet(id, out var cached))
+            return cached;
+
+        var member = (await planet.Node.GetJsonAsync<PlanetMember>($"{ISharedPlanetMember.BaseRoute}/{id}")).Data;
+
+        return _client.Cache.Sync(member);
+    }
+    
+    private void OnRoleOrderUpdate(RoleOrderEvent e)
+    {
+        if (!_client.Cache.Planets.TryGet(e.PlanetId, out var planet))
+            return;
+
+        planet.NotifyRoleOrderChange(e);
+    }
+
+    private async Task OnNodeReconnect(Node node)
+    {
+        foreach (var planet in _connectedPlanets.Where(x => x.NodeName == node.Name))
+        {
+            await node.HubConnection.SendAsync("JoinPlanet", planet.Id);
+            Log($"Rejoined SignalR group for planet {planet.Id}");
+        }
+    }
+
+    private void HookHubEvents(Node node)
+    {
+        node.HubConnection.On<RoleOrderEvent>("RoleOrder-Update", OnRoleOrderUpdate);
+    }
+
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/SafetyService.cs b/Valour/Sdk/Services/SafetyService.cs
new file mode 100644
index 000000000..f2c1055c7
--- /dev/null
+++ b/Valour/Sdk/Services/SafetyService.cs
@@ -0,0 +1,28 @@
+using Valour.Sdk.Client;
+using Valour.Shared;
+
+namespace Valour.Sdk.Services;
+
+public class SafetyService : ServiceBase
+{
+    private static readonly LogOptions LogOptions = new (
+        "SafetyService",
+        "#036bfc",
+        "#fc0356",
+        "#fc8403"
+    );
+    
+    private readonly ValourClient _client;
+
+    public SafetyService(ValourClient client)
+    {
+        _client = client;
+        SetupLogging(client.Logger, LogOptions);
+    }
+    
+    public async Task<TaskResult> PostReportAsync(Report report)
+    {
+        var response = await _client.PrimaryNode.PostAsync("api/reports", report);
+        return response;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/ServiceBase.cs b/Valour/Sdk/Services/ServiceBase.cs
new file mode 100644
index 000000000..171404dce
--- /dev/null
+++ b/Valour/Sdk/Services/ServiceBase.cs
@@ -0,0 +1,64 @@
+using Valour.Shared;
+
+namespace Valour.Sdk.Services;
+
+public class LogOptions
+{
+    public readonly string Prefix;
+    public readonly string Color;
+    public readonly string ErrorColor;
+    public readonly string WarningColor;
+    
+    public LogOptions(string prefix = "?", string color = "white", string errorColor = "red", string warningColor = "yellow")
+    {
+        Prefix = prefix;
+        Color = color;
+        ErrorColor = errorColor;
+        WarningColor = warningColor;
+    }
+}
+
+public abstract class ServiceBase
+{
+    private LogOptions _logOptions;
+    private LoggingService _logger;
+    
+    protected void SetupLogging(LoggingService logger, LogOptions options = null)
+    {
+        _logger = logger;
+        _logOptions = options ?? new LogOptions();
+    }
+    
+    protected void Log(string message)
+    {
+        _logger.Log(_logOptions.Prefix, message, _logOptions.Color);
+    }
+    
+    protected void LogError(string message)
+    {
+        _logger.Log(_logOptions.Prefix, message, _logOptions.ErrorColor);
+    }
+    
+    protected void LogError(string message, ITaskResult result)
+    {
+        _logger.Log(_logOptions.Prefix, message + "\n \n" + result.Message, _logOptions.ErrorColor);
+    }
+
+    protected void LogIfError(string message, ITaskResult result)
+    {
+        if (result.Success)
+            return;
+        
+        LogError(message + "\n \n" + result.Message);
+    }
+    
+    protected void LogError(string message, Exception ex)
+    {
+        LogError(message + "\n \n Exception: \n \n" + ex.Message);
+    }
+    
+    protected void LogWarning(string message)
+    {
+        _logger.Log(_logOptions.Prefix, message, _logOptions.WarningColor);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/StaffService.cs b/Valour/Sdk/Services/StaffService.cs
new file mode 100644
index 000000000..97bf9c3d5
--- /dev/null
+++ b/Valour/Sdk/Services/StaffService.cs
@@ -0,0 +1,62 @@
+using Valour.Sdk.Client;
+using Valour.Sdk.Models.Economy;
+using Valour.Shared;
+using Valour.Shared.Models;
+using Valour.Shared.Models.Staff;
+
+namespace Valour.Sdk.Services;
+
+public class StaffService : ServiceBase
+{
+    private static readonly LogOptions LogOptions = new (
+        "StaffService",
+        "#036bfc",
+        "#fc0356",
+        "#fc8403"
+    );
+    
+    private readonly ValourClient _client;
+    
+    public StaffService(ValourClient client)
+    {
+        _client = client;
+        SetupLogging(client.Logger, LogOptions);
+    }
+    
+    public PagedReader<Report> GetReportPagedReader(ReportQueryModel model, int amount = 50)
+    {
+        return new PagedReader<Report>(_client.PrimaryNode, "api/staff/reports", amount, postData: model);
+    }
+    
+    public PagedReader<User> GetUserQueryReader(UserQueryModel model, int amount = 50)
+    {
+        return new PagedReader<User>(_client.PrimaryNode, "api/users/query", amount, postData: model);
+    }
+    
+    public async Task<TaskResult> SetUserDisabledAsync(long userId, bool value)
+    {
+        var request = new DisableUserRequest()
+        {
+            UserId = userId,
+            Value = value
+        };
+        
+        return await _client.PrimaryNode.PostAsync($"api/staff/disable", request);
+    }
+    
+    public async Task<TaskResult> DeleteUserAsync(long userId)
+    {
+        var request = new DeleteUserRequest()
+        {
+            UserId = userId
+        };
+        
+        return await _client.PrimaryNode.PostAsync($"api/staff/delete", request);
+    }
+
+    public async Task<Message> GetMessageAsync(long messageId)
+    {
+        var result = await _client.PrimaryNode.GetJsonAsync<Message>($"api/staff/messages/{messageId}");
+        return result.Data;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/SubscriptionService.cs b/Valour/Sdk/Services/SubscriptionService.cs
new file mode 100644
index 000000000..efef7ae2d
--- /dev/null
+++ b/Valour/Sdk/Services/SubscriptionService.cs
@@ -0,0 +1,54 @@
+using Valour.Sdk.Client;
+using Valour.Shared;
+
+namespace Valour.Sdk.Services;
+
+public class SubscriptionService
+{
+    private readonly ValourClient _client;
+    
+    public SubscriptionService(ValourClient client)
+    {
+        _client = client;
+    }
+    
+    /// <summary>
+    /// Subscribe to Valour Plus! (...or Premium? What are we even calling it???)
+    /// </summary>
+    public async Task<TaskResult> SubscribeAsync(string type)
+    {
+        var result = await _client.PrimaryNode.PostAsyncWithResponse<TaskResult>($"api/subscriptions/{type}/start");
+        if (!result.Success)
+        {
+            return new TaskResult(false, result.Message);
+        }
+
+        return result.Data;
+    }
+    
+    /// <summary>
+    /// Unsubscribe (sobs quietly in the corner)
+    /// </summary>
+    public async Task<TaskResult> UnsubscribeAsync()
+    {
+        var result = await _client.PrimaryNode.PostAsyncWithResponse<TaskResult>($"api/subscriptions/end");
+        if (!result.Success)
+        {
+            return new TaskResult(false, result.Message);
+        }
+
+        return result.Data;
+    }
+    
+    public async Task<decimal> GetSubscriptionPriceAsync(string type)
+    {
+        var result = await _client.PrimaryNode.GetJsonAsync<decimal>($"api/subscriptions/{type}/price");
+        return result.Data;
+    }
+
+    public async Task<UserSubscription> GetActiveSubscriptionAsync()
+    {
+        var result = await _client.PrimaryNode.GetJsonAsync<UserSubscription>($"api/subscriptions/active/{_client.Me.Id}", true);
+        return result.Data;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/TenorService.cs b/Valour/Sdk/Services/TenorService.cs
new file mode 100644
index 000000000..91848c360
--- /dev/null
+++ b/Valour/Sdk/Services/TenorService.cs
@@ -0,0 +1,99 @@
+using Valour.Sdk.Client;
+using Valour.Shared;
+using Valour.TenorTwo;
+using Valour.TenorTwo.Models;
+
+namespace Valour.Sdk.Services;
+
+public class TenorService : ServiceBase
+{
+    /// <summary>
+    /// The key for Valour using the Tenor API
+    /// </summary>
+    private const string TenorKey = "AIzaSyCpYasE9IZNecc7ZPEjHTpOVssJT1aUC_4";
+
+    /// <summary>
+    /// Client for interacting with the Tenor API
+    /// </summary>
+    public TenorClient Client => _tenor;
+    
+    private readonly HttpClient _httpClient;
+    
+    /// <summary>
+    /// The Tenor favorites of this user
+    /// </summary>
+    public readonly IReadOnlyList<TenorFavorite> TenorFavorites;
+    private List<TenorFavorite> _tenorFavorites = new();
+    
+    public static readonly List<MediaFormatType> Formats = new()
+    {
+        MediaFormatType.gif,
+        MediaFormatType.tinygif
+    };
+    
+    private readonly LogOptions _logOptions = new(
+        "PlanetService",
+        "#3381a3",
+        "#a3333e",
+        "#a39433"
+    );
+    
+    private readonly ValourClient _client;
+    private readonly TenorClient _tenor;
+    
+    public TenorService(HttpClient httpClient, ValourClient client)
+    {
+        _client = client;
+        SetupLogging(client.Logger, _logOptions);
+        
+        _httpClient = httpClient;
+        TenorFavorites = _tenorFavorites;
+        _tenor = new TenorClient(TenorKey, "valour", http: httpClient);
+    }
+    
+    public HttpClient GetHttpClient()
+    {
+        return _httpClient;
+    }
+    
+    public async Task LoadTenorFavoritesAsync()
+    {
+        var response = await _client.PrimaryNode.GetJsonAsync<List<TenorFavorite>>("api/users/me/tenorfavorites");
+        if (!response.Success)
+        {
+            LogError("Failed to load Tenor favorites", response);
+            return;
+        }
+        
+        _tenorFavorites.Clear();
+        _tenorFavorites.AddRange(response.Data);
+        
+        Log($"Loaded {TenorFavorites.Count} Tenor favorites");
+    }
+    
+    /// <summary>
+    /// Tries to add the given Tenor favorite
+    /// </summary>
+    public async Task<TaskResult<TenorFavorite>> AddTenorFavorite(TenorFavorite favorite)
+    {
+        var result = await favorite.CreateAsync();
+
+        if (result.Success)
+            _tenorFavorites.Add(result.Data);
+
+        return result;
+    }
+
+    /// <summary>
+    /// Tries to delete the given Tenor favorite
+    /// </summary>
+    public async Task<TaskResult> RemoveTenorFavorite(TenorFavorite favorite)
+    {
+        var result = await favorite.DeleteAsync();
+
+        if (result.Success)
+            _tenorFavorites.RemoveAll(x => x.Id == favorite.Id);
+
+        return result;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/ThemeService.cs b/Valour/Sdk/Services/ThemeService.cs
new file mode 100644
index 000000000..534a1cf6d
--- /dev/null
+++ b/Valour/Sdk/Services/ThemeService.cs
@@ -0,0 +1,55 @@
+using Microsoft.Extensions.Logging;
+using Valour.Sdk.Client;
+using Valour.Sdk.Models.Themes;
+
+namespace Valour.Sdk.Services;
+
+public class ThemeService : ServiceBase
+{
+    private static readonly LogOptions LogOptions = new (
+        "ThemeService",
+        "#036bfc",
+        "#fc0356",
+        "#fc8403"
+    );
+    
+    private readonly ValourClient _client;
+
+    public ThemeService(ValourClient client)
+    {
+        _client = client;
+        SetupLogging(client.Logger, LogOptions);
+    }
+    
+    // No need to cache themes
+    public async Task<Theme> FetchThemeAsync(long id)
+    {
+        var response = await _client.PrimaryNode.GetJsonAsync<Theme>($"api/themes/{id}");
+        if (!response.Success)
+        {
+            LogWarning($"Failed to get theme: {response.Message}");
+            return null;
+        }
+
+        return response.Data;
+    }
+    
+    public PagedReader<ThemeMeta> GetAvailableThemeReader(int amount = 20, string search = null)
+    {
+        var query = new Dictionary<string, string>() {{ "search", search }}; 
+        var reader = new PagedReader<ThemeMeta>(_client.PrimaryNode, "api/themes", amount, query);
+        return reader;
+    }
+    
+    public async Task<List<ThemeMeta>> GetMyThemes()
+    {
+        var response = await _client.PrimaryNode.GetJsonAsync<List<ThemeMeta>>("api/themes/me");
+        if (!response.Success)
+        {
+            LogWarning($"Failed to get my themes: {response.Message}");
+            return new List<ThemeMeta>();
+        }
+
+        return response.Data;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Sdk/Services/UserService.cs b/Valour/Sdk/Services/UserService.cs
new file mode 100644
index 000000000..bec9b7704
--- /dev/null
+++ b/Valour/Sdk/Services/UserService.cs
@@ -0,0 +1,43 @@
+using Valour.Sdk.Client;
+using Valour.Shared;
+using Valour.Shared.Models;
+
+namespace Valour.Sdk.Services;
+
+public class UserService : ServiceBase
+{
+    private readonly LogOptions _logOptions = new(
+        "UserService",
+        "#3381a3",
+        "#a3333e",
+        "#a39433"
+    );
+    
+    private readonly ValourClient _client;
+
+    public UserService(ValourClient client)
+    {
+        _client = client;
+        SetupLogging(_client.Logger, _logOptions);
+    }
+    
+    public async ValueTask<User> FetchUserAsync(long id, bool skipCache = false)
+    {
+        if (!skipCache && _client.Cache.Users.TryGet(id, out var cached))
+            return cached;
+        
+        var user = (await _client.PrimaryNode.GetJsonAsync<User>($"{ISharedUser.BaseRoute}/{id}")).Data;
+
+        return _client.Cache.Sync(user);
+    }
+
+    public async ValueTask<UserProfile> FetchProfileAsync(long userid, bool skipCache)
+    {
+        if (!skipCache && _client.Cache.UserProfiles.TryGet(userid, out var cached))
+            return cached;
+        
+        var profile = (await _client.PrimaryNode.GetJsonAsync<UserProfile>($"api/userProfiles/{userid}")).Data;
+        
+        return _client.Cache.Sync(profile);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Server/Api/Dynamic/MessageApi.cs b/Valour/Server/Api/Dynamic/MessageApi.cs
new file mode 100644
index 000000000..b144f36f1
--- /dev/null
+++ b/Valour/Server/Api/Dynamic/MessageApi.cs
@@ -0,0 +1,222 @@
+using System.Text.Json;
+using Microsoft.AspNetCore.Mvc;
+using Valour.Shared.Authorization;
+using Valour.Shared.Models;
+
+namespace Valour.Server.Api.Dynamic;
+
+public class MessageApi
+{
+    [ValourRoute(HttpVerbs.Post, "api/messages")]
+    [UserRequired(UserPermissionsEnum.Messages)]
+    public static async Task<IResult> PostMessageRouteAsync(
+        [FromBody] Message message, 
+        long channelId,
+        MessageService messageService,
+        ChannelService channelService,
+        PlanetMemberService memberService,
+        TokenService tokenService,
+        PlanetRoleService roleService)
+    {
+        var token = await tokenService.GetCurrentTokenAsync();
+        var userId = token.UserId;
+        
+        if (message is null)
+            return ValourResult.BadRequest("Include message in body");
+        
+        var channel = await channelService.GetAsync(channelId);
+        if (channel is null)
+            return ValourResult.NotFound("Channel not found");
+        
+        if (!await channelService.IsMemberAsync(channel, userId))
+            return ValourResult.Forbid("You are not a member of this channel");
+
+        if (channel.ChannelType == ChannelTypeEnum.DirectChat)
+        {
+            if (!token.HasScope(UserPermissions.DirectMessages))
+            {
+                return ValourResult.Forbid("Token lacks permission to post messages in direct chat channels");
+            }
+        }
+        
+        // For planet channels, planet roles and membership are used
+        // to determine if the user can post messages and content
+        if (channel.PlanetId is not null)
+        {
+            var member = await memberService.GetCurrentAsync(channel.PlanetId.Value);
+            if (member is null)
+                return ValourResult.Forbid("You are not a member of the planet this channel belongs to");
+            
+            // NOTE: We don't have to check View permission because lacking view will
+            // cause every other permission check to fail
+            
+            // Check for message posting permissions
+            if (!await memberService.HasPermissionAsync(member, channel, ChatChannelPermissions.PostMessages))
+                return ValourResult.Forbid("You lack permission to post messages in this channel");
+            
+            // If the message has attachments...
+            if (!string.IsNullOrWhiteSpace(message.AttachmentsData))
+            {
+                if (!await memberService.HasPermissionAsync(member, channel, ChatChannelPermissions.AttachContent))
+                    return ValourResult.Forbid("You lack permission to attach content to messages in this channel");
+            }
+
+            // If the message has embed data...
+            if (!string.IsNullOrWhiteSpace(message.EmbedData))
+            {
+                if (!await memberService.HasPermissionAsync(member, channel, ChatChannelPermissions.Embed))
+                    return ValourResult.Forbid("You lack permission to attach embeds to messages in this channel");
+            }
+            
+            // Check mention permissions...
+            if (!string.IsNullOrWhiteSpace(message.MentionsData))
+            {
+                var mentions = JsonSerializer.Deserialize<List<Mention>>(message.MentionsData);
+                if (mentions is not null)
+                {
+                    foreach (var mention in mentions)
+                    {
+                        if (mention.Type == MentionType.Role)
+                        {
+                            var role = await roleService.GetAsync(mention.TargetId);
+                            if (role is null)
+                                return ValourResult.BadRequest("Invalid role mention");
+
+                            if (role.AnyoneCanMention)
+                                continue;
+
+                            if (!await memberService.HasPermissionAsync(member, PlanetPermissions.MentionAll))
+                                return ValourResult.Forbid($"You lack permission to mention the role {role.Name}");
+                        }
+                    }
+                }
+                else
+                {
+                    message.MentionsData = null;
+                }
+            }
+        }
+        
+        var result = await messageService.PostMessageAsync(message);
+        if (!result.Success)
+        {
+            return ValourResult.BadRequest(result.Message);
+        }
+
+        return Results.Json(result.Data);
+    }
+    
+    [ValourRoute(HttpVerbs.Put, "api/messages/{id}")]
+    [UserRequired(UserPermissionsEnum.Messages)]
+    public static async Task<IResult> EditMessageRouteAsync(
+        [FromBody] Message message,
+        long id,
+        MessageService messageService,
+        TokenService tokenService)
+    {
+        var token = await tokenService.GetCurrentTokenAsync();
+        
+        if (message.PlanetId is null)
+        {
+            if (!token.HasScope(UserPermissions.DirectMessages))
+            {
+                return ValourResult.Forbid("Token lacks permission to delete messages in direct chat channels");
+            }
+        }
+        
+        if (message.Id != id)
+            return ValourResult.BadRequest("Message id in body does not match message id in route");
+        
+        if (message.AuthorUserId != token.UserId)
+            return ValourResult.Forbid("You are not the author of this message");
+        
+        var result = await messageService.EditMessageAsync(message);
+        if (!result.Success)
+        {
+            return ValourResult.BadRequest(result.Message);
+        }
+
+        return Results.Json(result.Data);
+    }
+    
+    [ValourRoute(HttpVerbs.Delete, "api/messages/{id}")]
+    [UserRequired(UserPermissionsEnum.Messages)]
+    public static async Task<IResult> DeleteMessageRouteAsync(
+        long id,
+        MessageService messageService,
+        ChannelService channelService,
+        TokenService tokenService,
+        PlanetMemberService memberService)
+    {
+        var token = await tokenService.GetCurrentTokenAsync();
+        var message = await messageService.GetMessageNoReplyAsync(id);
+        
+        // Direct messages require stronger token perms
+        if (message.PlanetId is null)
+        {
+            if (!token.HasScope(UserPermissions.DirectMessages))
+            {
+                return ValourResult.Forbid("Token lacks permission to delete messages in direct chat channels");
+            }
+        }
+        
+        // Determine permissions
+
+        // First off, if the user is the sender they can always delete
+        if (message.AuthorUserId != token.UserId)
+        {
+            if (message.PlanetId is null)
+                return ValourResult.Forbid("Only the sender can delete these messages");
+            
+            // Otherwise, we check planet channel permissions
+            var member = await memberService.GetCurrentAsync(message.PlanetId.Value);
+            if (member is null)
+                return ValourResult.Forbid("You are not a member of the planet this channel belongs to");
+
+            var channel = await channelService.GetAsync(message.ChannelId);
+
+            if (!await memberService.HasPermissionAsync(member, channel, ChatChannelPermissions.ManageMessages))
+            {
+                return ValourResult.Forbid("You do not have permission to manage messages in this channel");
+            }
+        }
+        
+        var result = await messageService.DeleteMessageAsync(message.Id);
+        if (!result.Success)
+        {
+            return ValourResult.BadRequest(result.Message);
+        }
+        
+        return Results.Ok();
+    }
+    
+    
+    [ValourRoute(HttpVerbs.Get, "api/messages/{id}")]
+    [UserRequired(UserPermissionsEnum.Messages)]
+    public static async Task<IResult> GetMessageAsync(
+        long id,
+        MessageService messageService,
+        ChannelService channelService,
+        TokenService tokenService)
+    {
+        var token = await tokenService.GetCurrentTokenAsync();
+        
+        var message = await messageService.GetMessageAsync(id);
+        if (message is null)
+            return ValourResult.NotFound<Message>();
+        
+        var channel = await channelService.GetAsync(message.ChannelId);
+        if (!await channelService.IsMemberAsync(channel, token.UserId))
+            return ValourResult.Forbid("You are not a member of this channel");
+        
+        if (message.PlanetId is null)
+        {
+            if (!token.HasScope(UserPermissions.DirectMessages))
+            {
+                return ValourResult.Forbid("Token lacks permission to delete messages in this channel");
+            }
+        }
+        
+        return Results.Json(message);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Server/Models/HostedPlanet.cs b/Valour/Server/Models/HostedPlanet.cs
new file mode 100644
index 000000000..ea505233a
--- /dev/null
+++ b/Valour/Server/Models/HostedPlanet.cs
@@ -0,0 +1,32 @@
+using Valour.Server.Utilities;
+using Valour.Shared.Extensions;
+using Valour.Shared.Models;
+
+namespace Valour.Server.Models;
+
+/// <summary>
+/// The HostedPlanet class is used for caching planet information on the server
+/// for planets which are directly hosted by that node
+/// </summary>
+public class HostedPlanet : ISharedModel<long>
+{
+    public Planet Planet { get; private set; }
+
+    public SortedModelCache<PlanetRole, long> Roles;
+    
+    public long Id
+    {
+        get => Planet.Id;
+        set => Planet.Id = value;
+    }
+    
+    public HostedPlanet(Planet planet)
+    {
+        Planet = planet;
+    }
+    
+    public void Update(Planet updated)
+    {
+        Planet.CopyAllTo(updated);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Server/Services/HostedPlanetService.cs b/Valour/Server/Services/HostedPlanetService.cs
new file mode 100644
index 000000000..0710359fe
--- /dev/null
+++ b/Valour/Server/Services/HostedPlanetService.cs
@@ -0,0 +1,40 @@
+using System.Collections.Concurrent;
+using Valour.Server.Utilities;
+
+namespace Valour.Server.Services;
+
+public class HostedPlanetService
+{
+    /// <summary>
+    /// A cache that holds planets hosted by this node. Nodes keep their hosted
+    /// planets in-memory to reduce database load.
+    /// </summary>
+    private readonly ModelCache<HostedPlanet, long> _hostedPlanets = new();
+    
+    private readonly HashSet<long> _hostedPlanetIds = new();
+    
+    public HostedPlanet Get(long id)
+    {
+        _hostedPlanets.Lookup.TryGetValue(id, out var planet);
+        return planet;
+    }
+    
+    public void Add(Planet planet)
+    {
+        var hosted = new HostedPlanet(planet);
+        _hostedPlanets.Add(hosted);
+        _hostedPlanetIds.Add(planet.Id);
+    }
+    
+    public void Remove(long id)
+    {
+        _hostedPlanets.Remove(id);
+        _hostedPlanetIds.Remove(id);
+    }
+    
+    public IEnumerable<long> GetHostedPlanetIds()
+    {
+        return _hostedPlanetIds;
+    }
+    
+}
\ No newline at end of file
diff --git a/Valour/Server/Services/MessageService.cs b/Valour/Server/Services/MessageService.cs
new file mode 100644
index 000000000..3041bbc60
--- /dev/null
+++ b/Valour/Server/Services/MessageService.cs
@@ -0,0 +1,499 @@
+using System.Text.Json;
+using Valour.Sdk.Models.Messages.Embeds;
+using Valour.Sdk.Models.Messages.Embeds.Items;
+using Valour.Server.Cdn;
+using Valour.Server.Database;
+using Valour.Server.Utilities;
+using Valour.Server.Workers;
+using Valour.Shared;
+using Valour.Shared.Models;
+
+namespace Valour.Server.Services;
+
+public class MessageService
+{
+    private readonly ILogger<MessageService> _logger;
+    private readonly ValourDb _db;
+    private readonly NodeService _nodeService;
+    private readonly ChannelService _channelService;
+    private readonly NotificationService _notificationService;
+    private readonly ChannelStateService _stateService;
+    private readonly CoreHubService _coreHubService;
+    private readonly HttpClient _http;
+
+    public MessageService(
+        ILogger<MessageService> logger,
+        ValourDb db, 
+        NodeService nodeService, 
+        NotificationService notificationService, 
+        ChannelStateService stateService,
+        IHttpClientFactory http, 
+        CoreHubService coreHubService, 
+        ChannelService channelService)
+    {
+        _logger = logger;
+        _db = db;
+        _nodeService = nodeService;
+        _notificationService = notificationService;
+        _stateService = stateService;
+        _http = http.CreateClient();
+        _coreHubService = coreHubService;
+        _channelService = channelService;
+    }
+    
+    /// <summary>
+    /// Returns the message with the given id
+    /// Will include the reply to message if it exists
+    /// </summary>
+    public async Task<Message> GetMessageAsync(long id)
+    {
+        var message = await _db.Messages.AsNoTracking()
+            .Include(x => x.ReplyToMessage)
+            .FirstOrDefaultAsync(x => x.Id == id);
+        
+        return message?.ToModel();
+    }
+    
+    /// <summary>
+    /// Returns the message with the given id (no reply!)
+    /// </summary>
+    public async Task<Message> GetMessageNoReplyAsync(long id) =>
+        (await _db.Messages.FindAsync(id)).ToModel();
+    
+    /// <summary>
+    /// Used to post a message 
+    /// </summary>
+    public async Task<TaskResult<Message>> PostMessageAsync(Message message)
+    {
+        if (message is null)
+            return TaskResult<Message>.FromFailure("Include message");
+
+        // Handle node planet ownership
+        if (message.PlanetId is not null)
+        {
+            if (!await _nodeService.IsHostingPlanet(message.PlanetId.Value))
+            {
+                return TaskResult<Message>.FromFailure("Planet belongs to another node.");
+            }
+        }
+        
+        var user = await _db.Users.FindAsync(message.AuthorUserId);
+        if (user is null)
+            return TaskResult<Message>.FromFailure("Author user not found.");
+        
+        var channel = await _db.Channels.FindAsync(message.ChannelId);
+        if (channel is null)
+            return TaskResult<Message>.FromFailure("Channel not found.");
+
+        if (channel.PlanetId != message.PlanetId)
+            return TaskResult<Message>.FromFailure("Invalid planet id. Must match channel's planet id.");
+        
+        if (!ISharedChannel.ChatChannelTypes.Contains(channel.ChannelType))
+            return TaskResult<Message>.FromFailure("Channel is not a message channel.");
+
+        Valour.Database.Planet planet = null;
+        Valour.Database.PlanetMember member = null;
+        
+        // Validation specifically for planet messages
+        if (channel.PlanetId is not null)
+        {
+            if (channel.PlanetId != message.PlanetId)
+                return TaskResult<Message>.FromFailure("Invalid planet id. Must match channel's planet id.");
+
+            planet = await _db.Planets.FindAsync(channel.PlanetId);
+            if (planet is null)
+                return TaskResult<Message>.FromFailure("Planet not found.");
+            
+            if (!ISharedChannel.PlanetChannelTypes.Contains(channel.ChannelType))
+                return TaskResult<Message>.FromFailure("Only planet channel messages can have a planet id.");
+            
+            if (message.AuthorMemberId is null)
+                return TaskResult<Message>.FromFailure("AuthorMemberId is required for planet channel messages.");
+
+            member = await _db.PlanetMembers.FindAsync(message.AuthorMemberId);
+            if (member is null)
+                return TaskResult<Message>.FromFailure("Member id does not exist or is invalid for this planet.");
+            
+            if (member.UserId != message.AuthorUserId)
+                return TaskResult<Message>.FromFailure("Mismatch between member's user id and message author user id.");
+        }
+
+        // Handle replies
+        if (message.ReplyToId is not null)
+        {
+            var replyTo = (await _db.Messages.FindAsync(message.ReplyToId)).ToModel();
+            if (replyTo is null)
+            {
+                // Try to get from cache if it has not yet posted
+                replyTo = PlanetMessageWorker.GetStagedMessage(message.ReplyToId.Value);
+                
+                if (replyTo is null)
+                    return TaskResult<Message>.FromFailure("ReplyToId does not exist.");
+            }
+
+            // TODO: Technically we could support this in the future
+            if (replyTo.ChannelId != channel.Id)
+                return TaskResult<Message>.FromFailure("Cannot reply to a message from another channel.");
+            
+            message.ReplyTo = replyTo;
+        }
+        
+        if (string.IsNullOrEmpty(message.Content) &&
+            string.IsNullOrEmpty(message.EmbedData) &&
+            string.IsNullOrEmpty(message.AttachmentsData))
+            return TaskResult<Message>.FromFailure("Message must contain content, embed data, or attachments.");
+        
+        if (message.Fingerprint is null)
+            return TaskResult<Message>.FromFailure("Fingerprint is required. Generating a random UUID is suggested.");
+        
+        if (message.Content != null && message.Content.Length > 2048)
+            return TaskResult<Message>.FromFailure("Content must be under 2048 chars");
+
+
+        if (!string.IsNullOrWhiteSpace(message.EmbedData))
+        {
+            if (message.EmbedData.Length > 65535)
+            {
+                return TaskResult<Message>.FromFailure("EmbedData must be under 65535 chars");
+            }
+            
+            // load embed to check for anti-valour propaganda (incorrect media URIs)
+            var embed = JsonSerializer.Deserialize<Embed>(message.EmbedData);
+            foreach (var page in embed.Pages)
+            {
+                foreach (var item in page.GetAllItems())
+                {
+                    if (item.ItemType == EmbedItemType.Media)
+                    {
+                        var at = ((EmbedMediaItem)item).Attachment;
+                        var result = MediaUriHelper.ScanMediaUri(at);
+                        if (!result.Success)
+                            return TaskResult<Message>.FromFailure($"Error scanning media URI in embed | Page {page.Id} | ServerModel {item.Id}) | URI {at.Location}");
+                    }
+                }
+            }
+        }
+
+        if (message.Content is null)
+            message.Content = "";
+
+        message.Id = IdManager.Generate();
+        message.TimeSent = DateTime.UtcNow;
+        
+        List<Valour.Sdk.Models.MessageAttachment> attachments = null;
+        // Handle attachments
+        if (!string.IsNullOrWhiteSpace(message.AttachmentsData))
+        {
+            attachments = JsonSerializer.Deserialize<List<Valour.Sdk.Models.MessageAttachment>>(message.AttachmentsData);
+            if (attachments is not null)
+            {
+                foreach (var at in attachments)
+                {
+                    var result = MediaUriHelper.ScanMediaUri(at);
+                    if (!result.Success)
+                        return TaskResult<Message>.FromFailure($"Error scanning media URI in message attachments | {at.Location}");
+                }
+            }
+        }
+
+        // True if the scanning process makes changes to inline attachments
+        var inlineChange = false;
+        if (!string.IsNullOrWhiteSpace(message.Content))
+        {
+            // Prevent markdown bypassing inline, e.g. [](https://example.com)
+            // This is because a direct image link is not proxied and can steal ip addresses
+            message.Content = message.Content.Replace("[](", "(");
+	        
+            var inlineAttachments = await ProxyHandler.GetUrlAttachmentsFromContent(message.Content, _db, _http);
+            if (inlineAttachments is not null)
+            {
+                if (attachments is null)
+                {
+                    attachments = inlineAttachments;
+                }
+                else
+                {
+                    attachments.AddRange(inlineAttachments);
+                }
+
+                inlineChange = true;
+            }
+        }
+        
+        // If there was a change, serialize the new attachments data back to the message
+        if (inlineChange)
+        {
+            message.AttachmentsData = JsonSerializer.Serialize(attachments);
+        }
+        
+        // Handle mentions
+        var mentions = MentionParser.Parse(message.Content);
+        if (mentions is not null)
+        {
+            foreach (var mention in mentions)
+            {
+                await _notificationService.HandleMentionAsync(mention, planet, message, member, user, channel);
+            }
+            
+            // Serialize mentions to the message
+            message.MentionsData = JsonSerializer.Serialize(mentions);
+        }
+
+        if (planet is null)
+        {
+            if (channel.ChannelType == ChannelTypeEnum.DirectChat)
+            {
+                var channelMembers = await _db.ChannelMembers
+                    .AsNoTracking()
+                    .Include(x => x.User)
+                    .Where(x => x.ChannelId == channel.Id)
+                    .Select(x => x.UserId)
+                    .ToListAsync();
+
+                await _db.Messages.AddAsync(message.ToDatabase());
+                await _db.SaveChangesAsync();
+
+                await _coreHubService.RelayDirectMessage(message, _nodeService, channelMembers);
+            }
+            else
+            {
+                return TaskResult<Message>.FromFailure("Channel type not implemented!");
+            }
+        }
+        else
+        {
+            PlanetMessageWorker.AddToQueue(message);
+        }
+        
+        StatWorker.IncreaseMessageCount();
+        
+        // Update channel state
+        _stateService.SetChannelStateTime(channel.Id, message.TimeSent, channel.PlanetId);
+        if (channel.PlanetId is not null)
+        {
+            _coreHubService.NotifyChannelStateUpdate(channel.PlanetId.Value, channel.Id, message.TimeSent);
+        }
+
+        return TaskResult<Message>.FromData(message);
+    }
+
+    /// <summary>
+    /// Used to update a message
+    /// </summary>
+    public async Task<TaskResult<Message>> EditMessageAsync(Message updated)
+    {
+        if (updated is null)
+            return TaskResult<Message>.FromFailure("Include updated message");
+
+        ISharedMessage old = null;
+        Message stagedOld = null;
+        
+        var dbOld = await _db.Messages.FindAsync(updated.Id);
+        if (dbOld is not null)
+        {
+            old = dbOld;
+        }
+        else
+        {
+            stagedOld = PlanetMessageWorker.GetStagedMessage(updated.Id);
+            if (stagedOld is not null)
+            {
+                old = stagedOld;
+            }
+            else
+            {
+                return TaskResult<Message>.FromFailure("Message not found");
+            }
+        }
+        
+        // Sanity checks
+        if (string.IsNullOrEmpty(updated.Content) &&
+            string.IsNullOrEmpty(updated.EmbedData) &&
+            string.IsNullOrEmpty(updated.AttachmentsData))
+            return TaskResult<Message>.FromFailure("Updated message cannot be empty");
+        
+        if (updated.EmbedData != null && updated.EmbedData.Length > 65535)
+            return TaskResult<Message>.FromFailure("EmbedData must be under 65535 chars");
+        
+        if (updated.Content != null && updated.Content.Length > 2048)
+            return TaskResult<Message>.FromFailure("Content must be under 2048 chars");
+        
+        List<Valour.Sdk.Models.MessageAttachment> attachments = null;
+        bool inlineChange = false;
+
+        // Handle attachments
+        if (!string.IsNullOrWhiteSpace(updated.AttachmentsData))
+        {
+            attachments = JsonSerializer.Deserialize<List<Valour.Sdk.Models.MessageAttachment>>(updated.AttachmentsData);
+            if (attachments is not null)
+            {
+                foreach (var at in attachments)
+                {
+                    var result = MediaUriHelper.ScanMediaUri(at);
+                    if (!result.Success)
+                        return TaskResult<Message>.FromFailure(result.Message);
+                }
+                
+                // Remove old inline attachments
+                var n = attachments.RemoveAll(x => x.Inline);
+                if (n > 0)
+                    inlineChange = true;
+            }
+        }
+        
+        // Handle new inline attachments
+        if (!string.IsNullOrWhiteSpace(updated.Content))
+        {
+            var inlineAttachments = await ProxyHandler.GetUrlAttachmentsFromContent(updated.Content, _db, _http);
+            if (inlineAttachments is not null)
+            {
+                if (attachments is null)
+                {
+                    attachments = inlineAttachments;
+                }
+                else
+                {
+                    attachments.AddRange(inlineAttachments);
+                }
+                
+                inlineChange = true;
+            }
+        }
+        
+        // If there was a change, serialize the new attachments data back to the message
+        if (inlineChange)
+        {
+            updated.AttachmentsData = JsonSerializer.Serialize(attachments);
+        }
+
+        old.Content = updated.Content;
+        old.AttachmentsData = updated.AttachmentsData;
+        old.EmbedData = updated.EmbedData;
+        old.EditedTime = DateTime.UtcNow;
+        
+        // In this case, the message has posted to the database so
+        // we save changes there
+        if (dbOld is not null)
+        {
+            try
+            {
+                _db.Messages.Update(dbOld);
+                await _db.SaveChangesAsync();
+            }
+            catch (Exception e)
+            {
+                _logger.LogError(e, "Failed to update message");
+                return TaskResult<Message>.FromFailure("Failed to update message in database.");
+            }
+        }
+        
+        // Handle events
+
+        if (updated.PlanetId is not null)
+        {
+            _coreHubService.RelayMessageEdit(updated);
+        }
+        else
+        {
+            var channelUserIds = await _db.ChannelMembers
+                .AsNoTracking()
+                .Where(x => x.ChannelId == updated.ChannelId)
+                .Select(x => x.UserId)
+                .ToListAsync();
+            
+            await _coreHubService.RelayDirectMessageEdit(updated, _nodeService, channelUserIds);
+        }
+
+        return TaskResult<Message>.FromData(updated);
+    }
+
+    /// <summary>
+    /// Used to delete a message
+    /// </summary>
+    public async Task<TaskResult> DeleteMessageAsync(long messageId)
+    {
+        Message message = null;
+        
+        var dbMessage = await _db.Messages.FindAsync(messageId);
+        if (dbMessage is null)
+        {
+            // Check staging
+            var staged = PlanetMessageWorker.GetStagedMessage(messageId);
+            if (staged is not null)
+            {
+                message = staged;
+                PlanetMessageWorker.RemoveFromQueue(staged);
+            }
+            else
+            {
+                return TaskResult.FromFailure("Message not found");
+            }
+        }
+        else
+        {
+            message = dbMessage.ToModel();
+            
+            try
+            {
+                _db.Messages.Remove(dbMessage);
+                await _db.SaveChangesAsync();
+            }
+            catch (Exception e)
+            {
+                _logger.LogError(e, "Failed to delete message");
+                return TaskResult.FromFailure("Failed to delete message in database.");
+            }
+        }
+        
+        if (message.PlanetId is not null)
+        {
+            _coreHubService.NotifyMessageDeletion(message);
+        }
+        else
+        {
+            // TODO: Direct message deletion event
+        }
+
+        return TaskResult.SuccessResult;
+    }
+    
+    public async Task<List<Message>> GetChannelMessagesAsync(long channelId, int count = 50, long index = long.MaxValue)
+    {
+        var channel = await _channelService.GetAsync(channelId);
+        if (channel is null)
+            return null;
+        
+        if (!ISharedChannel.ChatChannelTypes.Contains(channel.ChannelType))
+            return null;
+
+        // Not sure why this request would even be made
+        if (count < 1)
+            return new();
+
+        List<Message> staged = null;
+
+        if (channel.ChannelType == ChannelTypeEnum.PlanetChat
+            && index == long.MaxValue) // ONLY INCLUDE STAGED FOR LATEST
+        {
+            staged = PlanetMessageWorker.GetStagedMessages(channel.Id);
+        }
+        
+        var messages = await _db.Messages
+            .AsNoTracking()
+            .Where(x => x.ChannelId == channel.Id && x.Id < index)
+            .Include(x => x.ReplyToMessage)
+            .OrderByDescending(x => x.Id)
+            .Take(count)
+            .Reverse()
+            .Select(x => x.ToModel())
+            .ToListAsync();
+
+        // Not all channels actually stage messages
+        if (staged is not null)
+        {
+            messages.AddRange(staged);
+        }
+
+        return messages;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Server/Services/PlanetPermissionService.cs b/Valour/Server/Services/PlanetPermissionService.cs
new file mode 100644
index 000000000..6244fb86f
--- /dev/null
+++ b/Valour/Server/Services/PlanetPermissionService.cs
@@ -0,0 +1,30 @@
+namespace Valour.Server.Services;
+
+// A note to those looking:
+// The idea of using role combinations and sequential hashing to provide
+// an extremely fast and low-storage alternative to traditional RBAC
+// is a concept that I have been working on for a while. When I did the
+// math and realized just how efficient it could be, I thought about
+// monetizing this or patenting it to prevent a company like Discord
+// from stealing it. But then I realized that this is a concept that
+// should be free and open to everyone. So feel free to use this
+// concept in your own projects, and if you want to credit me, that's
+// cool too. And also mention Valour :)
+
+// I'm going to also give this system the name HACKR-AUTH
+// (HAshed Combined Role Keyed AUTHorization)
+// because it sounds cool and I like acronyms.
+
+// There is one slight downside: for a community with 100 roles, there
+// is a 1 in 368 quadrillion chance of a hash collision. That's a risk
+// I'm willing to take.
+
+// - Spike, 2024
+
+/// <summary>
+/// Provides methods for checking and enforcing permissions in planets
+/// </summary>
+public class PlanetPermissionService
+{
+    private readonly PlanetRoleService _roleService;
+}
\ No newline at end of file
diff --git a/Valour/Server/Utilities/ModelCache.cs b/Valour/Server/Utilities/ModelCache.cs
new file mode 100644
index 000000000..7f7d12325
--- /dev/null
+++ b/Valour/Server/Utilities/ModelCache.cs
@@ -0,0 +1,149 @@
+using System.Collections;
+using Valour.Shared.Extensions;
+using Valour.Shared.Models;
+
+namespace Valour.Server.Utilities;
+
+/// <summary>
+/// The ModelCache is used for
+/// caching collections of models that are frequently accessed and updated.
+/// It performs no allocations and protects the internal store.
+/// </summary>
+public class ModelCache<T, TId> where T : ISharedModel<TId>
+{
+    public IReadOnlyList<T> Values { get; private set; }
+    public IReadOnlyDictionary<TId, T> Lookup { get; private set; }
+    
+    private List<T> _cache;
+    private Dictionary<TId, T> _lookup;
+    
+    public ModelCache()
+    {
+        _cache = new();
+        _lookup = new();
+    }
+    
+    public ModelCache(IEnumerable<T> initial)
+    {
+        _cache = initial.ToList();
+        _lookup = _cache.ToDictionary(x => x.Id);
+    }
+    
+    public void Reset(IEnumerable<T> initial)
+    {
+        _cache = initial.ToList();
+        _lookup = _cache.ToDictionary(x => x.Id);
+    }
+    
+    public void Add(T item)
+    {
+        _cache.Add(item);
+        _lookup.Add(item.Id, item);
+    }
+    
+    public void Remove(TId id)
+    {
+        if (_lookup.TryGetValue(id, out var item))
+        {
+            _cache.Remove(item);
+            _lookup.Remove(id);
+        }
+    }
+    
+    public void Update(T updated)
+    {
+        if (_lookup.TryGetValue(updated.Id, out var old))
+        {
+            updated.CopyAllTo(old);
+        }
+        else
+        {
+            Add(updated);
+        }
+    }
+    
+    public T Get(TId id)
+    {
+        _lookup.TryGetValue(id, out var item);
+        return item;
+    }
+}
+
+public class SortedModelCache<T, TId> where T : ISortable, ISharedModel<TId>
+{
+    public IReadOnlyList<T> Values { get; private set; }
+    public IReadOnlyDictionary<TId, T> Lookup { get; private set; }
+    
+    private List<T> _cache;
+    private Dictionary<TId, T> _lookup;
+    
+    public SortedModelCache()
+    {
+        _cache = new();
+        _lookup = new();
+    }
+    
+    public SortedModelCache(IEnumerable<T> initial)
+    {
+        _cache = initial.ToList();
+        _lookup = _cache.ToDictionary(x => x.Id);
+        
+        if (_cache.Count > 0)
+        {
+            _cache.Sort(ISortable.Compare);
+        }
+    }
+    
+    public void Reset(IEnumerable<T> initial)
+    {
+        _cache = initial.ToList();
+        _lookup = _cache.ToDictionary(x => x.Id);
+        
+        if (_cache.Count > 0)
+        {
+            _cache.Sort(ISortable.Compare);
+        }
+    }
+    
+    public void Add(T item)
+    {
+        _cache.Add(item);
+        _lookup.Add(item.Id, item);
+        _cache.Sort(ISortable.Compare);
+    }
+    
+    public void Remove(TId id)
+    {
+        if (_lookup.TryGetValue(id, out var item))
+        {
+            _cache.Remove(item);
+            _lookup.Remove(id);
+        }
+    }
+    
+    public void Update(T updated)
+    {
+        if (_lookup.TryGetValue(updated.Id, out var old))
+        {
+            var oldPos = old.GetSortPosition();
+            updated.CopyAllTo(old);
+            
+            // check if the position has changed
+            if (oldPos != updated.GetSortPosition())
+            {
+                _cache.Sort(ISortable.Compare);
+            }
+        }
+        else
+        {
+            Add(updated);
+            _cache.Sort(ISortable.Compare);
+        }
+    }
+    
+    public T Get(TId id)
+    {
+        _lookup.TryGetValue(id, out var item);
+        return item;
+    }
+}
\ No newline at end of file
diff --git a/Valour/Shared/Extensions/CopyToExtensions.cs b/Valour/Shared/Extensions/CopyToExtensions.cs
new file mode 100644
index 000000000..ecc54face
--- /dev/null
+++ b/Valour/Shared/Extensions/CopyToExtensions.cs
@@ -0,0 +1,78 @@
+using System.Reflection;
+
+namespace Valour.Shared.Extensions;
+
+public static class CopyToExtension
+{
+    public static void CopyAllTo<T>(this T source, T target, PropertyInfo[] properties, FieldInfo[] fields)
+    {
+        if (properties is not null)
+        {
+            foreach (var property in properties)
+            {
+                if (property.CanWrite)
+                    property.SetValue(target, property.GetValue(source, null), null);
+            }
+        }
+        
+        if (fields is not null)
+        {
+            foreach (var field in fields)
+            {
+                if (!field.IsStatic)
+                    field.SetValue(target, field.GetValue(source));
+            }
+        }
+    }
+    
+    public static void CopyAllTo<T>(this T source, T target)
+    {
+        var type = typeof(T);
+        foreach (var sourceProperty in type.GetProperties())
+        {
+            var targetProperty = type.GetProperty(sourceProperty.Name);
+            if (targetProperty.CanWrite)
+                targetProperty.SetValue(target, sourceProperty.GetValue(source, null), null);
+        }
+        foreach (var sourceField in type.GetFields())
+        {
+            var targetField = type.GetField(sourceField.Name);
+            if (!targetField.IsStatic)
+                targetField.SetValue(target, sourceField.GetValue(source));
+        }
+    }
+    
+    public static void CopyAllNonDefaultTo<T>(this T source, T target)
+    {
+        var type = typeof(T);
+        foreach (var sourceProperty in type.GetProperties())
+        {
+            var targetProperty = type.GetProperty(sourceProperty.Name);
+            if (targetProperty.CanWrite)
+            {
+                var sourceValue = sourceProperty.GetValue(source, null);
+                if (sourceValue != null && !IsDefaultValue(sourceValue))
+                {
+                    targetProperty.SetValue(target, sourceValue, null);
+                }
+            }
+        }
+        foreach (var sourceField in type.GetFields())
+        {
+            var targetField = type.GetField(sourceField.Name);
+            if (!targetField.IsStatic)
+            {
+                var sourceValue = sourceField.GetValue(source);
+                if (sourceValue != null && !IsDefaultValue(sourceValue))
+                {
+                    targetField.SetValue(target, sourceValue);
+                }
+            }
+        }
+    }
+
+    private static bool IsDefaultValue<T>(T value)
+    {
+        return EqualityComparer<T>.Default.Equals(value, default(T));
+    }
+}
\ No newline at end of file
diff --git a/Valour/Shared/Models/ChannelPosition.cs b/Valour/Shared/Models/ChannelPosition.cs
new file mode 100644
index 000000000..c7d5b8d81
--- /dev/null
+++ b/Valour/Shared/Models/ChannelPosition.cs
@@ -0,0 +1,209 @@
+using System.Runtime.CompilerServices;
+
+namespace Valour.Shared.Models;
+
+/// <summary>
+/// A wrapper for a channel position that provides utility methods
+/// </summary>
+public struct ChannelPosition
+{
+    public uint RawPosition { get; init; }
+    public uint Depth { get; init; }
+    public uint LocalPosition { get; init; }
+    
+    public ChannelPosition(uint rawPosition)
+    {
+        RawPosition = rawPosition;
+        Depth = GetDepth(rawPosition);
+        LocalPosition = GetLocalPosition(rawPosition, Depth);
+    }
+    
+    // Okay, I know what you're thinking: Why do these methods just call back to
+    // the static methods? Why not just implement it in the instance?
+    // The answer is that the database project needs to use the same
+    // implementations, and the database will not understand the struct instance.
+    // Thus, the actual implementations are static.
+    
+    public ChannelPosition Append(uint relativePosition)
+    {
+        if (Depth >= 4)
+            throw new InvalidOperationException("Cannot append to a channel with a depth of 4");
+        
+        return new ChannelPosition(AppendRelativePosition(RawPosition, relativePosition));
+    }
+
+    public ChannelPosition GetParentPosition()
+    {
+        return new ChannelPosition(GetParentPosition(RawPosition));
+    }
+    
+    public uint GetDirectChildMask()
+    {
+        return GetDirectChildMaskByDepth(Depth);
+    }
+    
+    ////////////////////
+    // Static Methods //
+    ////////////////////
+    
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetDepth(ISharedChannel channel) => GetDepth(channel.RawPosition);
+
+    public static uint GetDepth(uint position)
+    {
+        // This is the planet
+        if (position == 0)
+            return 0;
+        
+        // Check if the third and fourth bytes (depth 3 and 4) are present
+        if ((position & 0x0000FFFFu) == 0)
+        {
+            // If they are not, we must be in the first or second layer
+            if ((position & 0x00FF0000u) == 0)
+            {
+                // If the second byte is also zero, it's in the first layer (top level)
+                return 1;
+            }
+            // Otherwise, it's in the second layer
+            return 2;
+        }
+        else
+        {
+            // Check the lowest byte first (fourth layer)
+            if ((position & 0x000000FFu) == 0)
+            {
+                // If the fourth byte is zero, it's in the third layer
+                return 3;
+            }
+            
+            // If none of the previous checks matched, it’s in the fourth layer
+            return 4;
+        }   
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetLocalPosition(ISharedChannel channel) => GetLocalPosition(channel.RawPosition);
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetLocalPosition(uint position)
+    {
+        var depth = GetDepth(position);
+        // use depth to determine amount to shift
+        var shift = 8 * (4 - depth);
+        var shifted = position >> (int)shift;
+        // now clear the higher bits
+        return shifted & 0xFFu;
+    }
+    
+    // Overload for if you already know the depth
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetLocalPosition(uint position, uint depth)
+    {
+        // use depth to determine amount to shift
+        var shift = 8 * (4 - depth);
+        var shifted = position >> (int)shift;
+        // now clear the higher bits
+        return shifted & 0xFFu;
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint AppendRelativePosition(uint parentPosition, uint relativePosition)
+    {
+        var depth = GetDepth(parentPosition);
+        return AppendRelativePosition(parentPosition, relativePosition, depth);
+    }
+    
+    // Overload for if you already know the depth
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint AppendRelativePosition(uint parentPosition, uint relativePosition, uint depth)
+    {
+        // use depth to determine amount to shift
+        var shift = 8 * (3 - depth);
+        // shift the relative position to the correct position
+        var shifted = relativePosition << (int)shift;
+        // now add the relative position to the parent position
+        return parentPosition | shifted;
+    }
+    
+    /// <summary>
+    /// Returns the bounds of the descendants of a channel
+    /// </summary>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static (uint lower, uint upper) GetDescendentBounds(uint parentPosition)
+    {
+        var depth = GetDepth(parentPosition);
+        return GetDescendentBounds(parentPosition, depth);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static (uint lower, uint upper) GetDescendentBounds(uint parentPosition, uint depth)
+    {
+        var lower = GetLowerBound(parentPosition, depth);
+        var upper = GetUpperBound(parentPosition, depth);
+        
+        return (lower, upper);
+    }
+    
+    // This one is quite easy
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetLowerBound(uint parentPosition)
+    {
+        var depth = GetDepth(parentPosition);
+        return GetLowerBound(parentPosition, depth);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetLowerBound(uint parentPosition, uint depth)
+    {
+        return AppendRelativePosition(parentPosition, 1, depth);
+    }
+    
+    // This one is a bit more complex
+    // We cannot just append because we need to cover all of the bytes past the depth
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetUpperBound(uint parentPosition)
+    {
+        var depth = GetDepth(parentPosition);
+        return GetUpperBound(parentPosition, depth);
+    }
+    
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetUpperBound(uint parentPosition, uint depth)
+    {
+        var maxed = 0xFAFAFAFAu; // literally means 250-250-250-250
+        // maxed gets shifted right by 8 * (4 - depth)
+        var shift = 8 * depth; // so if depth = 1, shift = one byte, maxed = 0-250-250-250
+        var shifted = maxed >> (int)shift;
+        
+        return parentPosition | shifted;
+    }
+    
+    /// <summary>
+    /// Given a depth, returns a bit mask that can be used to get the direct children of a channel
+    /// </summary>
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetDirectChildMaskByDepth(uint depth)
+    {
+        return (0xFFFFFFFFu >> (int)((depth + 1) * 8));
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetParentPosition(uint position)
+    {
+        var depth = GetDepth(position);
+        return GetParentPosition(position, depth);
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint GetParentPosition(uint position, uint depth)
+    {
+        if (depth < 2)
+            return 0;
+        
+        var shift = 8 * (depth - 1);
+        
+        // shift to right then invert to avoid long
+        return position & ~(0xFFFFFFFFu >> (int)shift);
+    }
+
+}
\ No newline at end of file
diff --git a/Valour/Shared/Models/IMessageAuthor.cs b/Valour/Shared/Models/IMessageAuthor.cs
new file mode 100644
index 000000000..9b21ed86e
--- /dev/null
+++ b/Valour/Shared/Models/IMessageAuthor.cs
@@ -0,0 +1,8 @@
+namespace Valour.Shared.Models;
+
+public interface IMessageAuthor : ISharedModel<long>
+{
+    public string Name { get; }
+    public string GetAvatar(AvatarFormat format = AvatarFormat.WebpAnimated256);
+    public string GetFailedAvatar();
+}
\ No newline at end of file
diff --git a/Valour/Shared/Models/ISharedModel.cs b/Valour/Shared/Models/ISharedModel.cs
new file mode 100644
index 000000000..ae8ff6cba
--- /dev/null
+++ b/Valour/Shared/Models/ISharedModel.cs
@@ -0,0 +1,19 @@
+using System.Text.Json.Serialization;
+
+namespace Valour.Shared.Models;
+
+public interface ISharedModel
+{
+    public object GetId();
+}
+
+public interface ISharedModel<TId> : ISharedModel
+{
+    TId Id { get; set; }
+    object ISharedModel.GetId()
+    {
+        return Id;
+    }
+}
+
+
diff --git a/Valour/Shared/Models/ISharedPlanetModel.cs b/Valour/Shared/Models/ISharedPlanetModel.cs
new file mode 100644
index 000000000..5deee8714
--- /dev/null
+++ b/Valour/Shared/Models/ISharedPlanetModel.cs
@@ -0,0 +1,13 @@
+namespace Valour.Shared.Models;
+
+public interface ISharedPlanetModel
+{
+    long PlanetId { get; set; }
+}
+
+/// <summary>
+/// Planet items are items which are owned by a planet
+/// </summary>
+public interface ISharedPlanetModel<TId> : ISharedPlanetModel, ISharedModel<TId>
+{
+}
diff --git a/Valour/Shared/Models/ISortable.cs b/Valour/Shared/Models/ISortable.cs
new file mode 100644
index 000000000..034249d85
--- /dev/null
+++ b/Valour/Shared/Models/ISortable.cs
@@ -0,0 +1,26 @@
+namespace Valour.Shared.Models;
+
+public interface ISortable
+{
+    public static readonly SortableComparer Comparer = new SortableComparer();
+    
+    public uint GetSortPosition();
+
+    public static int Compare(ISortable x, ISortable y)
+    {
+        return x.GetSortPosition().CompareTo(y.GetSortPosition());
+    }
+    
+    public static int Compare<T>(T x, T y) where T : ISortable
+    {
+        return x.GetSortPosition().CompareTo(y.GetSortPosition());
+    }
+}
+
+public class SortableComparer : IComparer<ISortable>
+{
+    int IComparer<ISortable>.Compare(ISortable x, ISortable y)
+    {
+        return ISortable.Compare(x, y);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Shared/Models/PlanetListInfo.cs b/Valour/Shared/Models/PlanetListInfo.cs
new file mode 100644
index 000000000..cc6a1545a
--- /dev/null
+++ b/Valour/Shared/Models/PlanetListInfo.cs
@@ -0,0 +1,20 @@
+namespace Valour.Shared.Models;
+
+/// <summary>
+/// This information is used to give the client a summary of a planet that has
+/// not yet been loaded.
+/// </summary>
+public class PlanetListInfo
+{
+    public long PlanetId { get; set; }
+    public string Name { get; set; }
+    public string Description { get; set; }
+    public bool HasCustomIcon { get; set; }
+    public bool HasAnimatedIcon { get; set; }
+    public bool Nsfw { get; set; }
+    public int MemberCount { get; set; }
+    
+    // planet unread/read state
+    public bool HasUnread { get; set; }
+    public int UnreadNotificationCount { get; set; }
+}
\ No newline at end of file
diff --git a/Valour/Shared/Models/QueryResponse.cs b/Valour/Shared/Models/QueryResponse.cs
new file mode 100644
index 000000000..4b9e13a5b
--- /dev/null
+++ b/Valour/Shared/Models/QueryResponse.cs
@@ -0,0 +1,13 @@
+namespace Valour.Shared.Models;
+
+public class QueryResponse<T>
+{
+    public static QueryResponse<T> Empty = new QueryResponse<T>()
+    {
+        Items = new List<T>(),
+        TotalCount = 0
+    };
+    
+    public List<T> Items { get; set; }
+    public int TotalCount { get; set; }
+}
\ No newline at end of file
diff --git a/Valour/Shared/Models/RoleOrderEvent.cs b/Valour/Shared/Models/RoleOrderEvent.cs
new file mode 100644
index 000000000..ec9874552
--- /dev/null
+++ b/Valour/Shared/Models/RoleOrderEvent.cs
@@ -0,0 +1,7 @@
+namespace Valour.Shared.Models;
+
+public class RoleOrderEvent
+{
+    public long PlanetId { get; set; }
+    public List<long> Order { get; set; }
+}
\ No newline at end of file
diff --git a/Valour/Shared/Utilities/HybridEvent.cs b/Valour/Shared/Utilities/HybridEvent.cs
new file mode 100644
index 000000000..b8b0c42fb
--- /dev/null
+++ b/Valour/Shared/Utilities/HybridEvent.cs
@@ -0,0 +1,441 @@
+using Microsoft.Extensions.ObjectPool;
+
+namespace Valour.Shared.Utilities;
+
+/// <summary>
+/// The hybrid event handler allows a given method signature to be called both
+/// synchronously and asynchronously. Built for efficiency using two separate
+/// lists of delegates, with list pooling to minimize allocations.
+/// </summary>
+public class HybridEvent<TEventData> : IDisposable
+{
+    // Synchronous and asynchronous handler lists
+    private List<Action<TEventData>> _syncHandlers;
+    private List<Func<TEventData, Task>> _asyncHandlers;
+
+    // Init is false until the handler lists are initialized
+    private bool _init;
+
+    // Lock object for synchronous and asynchronous handler access
+    private readonly object _syncLock = new();
+    private readonly object _asyncLock = new();
+
+    // Object pool for list reuse
+    // This is static because it is shared across all instances of HybridEvent
+    private static readonly ObjectPool<List<Action<TEventData>>> SyncListPool = 
+        new DefaultObjectPool<List<Action<TEventData>>>(new ListPolicy<Action<TEventData>>());
+    private static readonly ObjectPool<List<Func<TEventData, Task>>> AsyncListPool =
+        new DefaultObjectPool<List<Func<TEventData, Task>>>(new ListPolicy<Func<TEventData, Task>>());
+    
+    // Object pool for task list
+    private static readonly ObjectPool<List<Task>> TaskListPool =
+        new DefaultObjectPool<List<Task>>(new ListPolicy<Task>());
+
+    private void InitIfNeeded()
+    {
+        if (!_init)
+        {
+            // set up handler lists
+            lock (_syncLock)
+            {
+                _syncHandlers = SyncListPool.Get();
+            }
+            
+            lock (_asyncLock)
+            {
+                _asyncHandlers = AsyncListPool.Get();
+            }
+            
+            _init = true;
+        }
+    }
+    
+    // Add a synchronous handler
+    public void AddHandler(Action<TEventData> handler)
+    {
+        InitIfNeeded();
+        
+        lock (_syncLock)
+        {
+            _syncHandlers.Add(handler);
+        }
+    }
+
+    // Add an asynchronous handler
+    public void AddHandler(Func<TEventData, Task> handler)
+    {
+        InitIfNeeded();
+        
+        lock (_asyncLock)
+        {
+            _asyncHandlers.Add(handler);
+        }
+    }
+
+    // Remove a synchronous handler
+    public void RemoveHandler(Action<TEventData> handler)
+    {
+        lock (_syncLock)
+        {
+            _syncHandlers.Remove(handler);
+        }
+    }
+
+    // Remove an asynchronous handler
+    public void RemoveHandler(Func<TEventData, Task> handler)
+    {
+        lock (_asyncLock)
+        {
+            _asyncHandlers.Remove(handler);
+        }
+    }
+
+    // Invoke all synchronous handlers with list pooling to prevent allocation
+    private void InvokeSyncHandlers(TEventData data)
+    {
+        // Get a pooled list for copying handlers
+        var handlersCopy = SyncListPool.Get();
+
+        // Copy handlers while locking to prevent concurrent modifications
+        lock (_syncLock)
+        {
+            handlersCopy.AddRange(_syncHandlers);  // Copy handlers into pooled list
+        }
+
+        try
+        {
+            // Invoke all handlers
+            for (int i = 0; i < handlersCopy.Count; i++)
+            {
+                if (handlersCopy[i] is not null)
+                {
+                    handlersCopy[i].Invoke(data); // No allocations, just iterating over the pooled list
+                }
+            }
+        }
+        finally
+        {
+            // Clear and return the list to the pool
+            handlersCopy.Clear();
+            SyncListPool.Return(handlersCopy);
+        }
+    }
+
+    // Invoke all asynchronous handlers concurrently with list pooling
+    private async Task InvokeAsyncHandlers(TEventData data)
+    {
+        // Get a pooled list for copying async handlers
+        var handlersCopy = AsyncListPool.Get();
+
+        // Copy handlers while locking to prevent concurrent modifications
+        lock (_asyncLock)
+        {
+            handlersCopy.AddRange(_asyncHandlers);  // Copy async handlers into pooled list
+        }
+        
+        var tasks = TaskListPool.Get();
+
+        try
+        {
+            // Invoke all async handlers in parallel using Task.WhenAll
+            for (int i = 0; i < handlersCopy.Count; i++)
+            {
+                if (handlersCopy[i] is not null)
+                {
+                    tasks.Add(handlersCopy[i].Invoke(data));  // Add tasks to list
+                }
+            }
+
+            await Task.WhenAll(tasks);  // Wait for all async handlers to complete
+        }
+        finally
+        {
+            // Clear and return the list to the pool
+            handlersCopy.Clear();
+            AsyncListPool.Return(handlersCopy);
+            TaskListPool.Return(tasks);
+        }
+    }
+
+    // Invoke both sync and async handlers
+    public void Invoke(TEventData data)
+    {
+        InvokeSyncHandlers(data);  // Call synchronous handlers first
+        _ = InvokeAsyncHandlers(data);  // Then call asynchronous handlers
+    }
+
+    // Enable += and -= operators for adding/removing handlers
+    public static HybridEvent<TEventData> operator +(HybridEvent<TEventData> handler, Action<TEventData> action)
+    {
+        if (handler is null)
+            handler = new HybridEvent<TEventData>();
+        
+        handler.AddHandler(action);
+        return handler;
+    }
+
+    public static HybridEvent<TEventData> operator +(HybridEvent<TEventData> handler, Func<TEventData, Task> action)
+    {
+        if (handler is null)
+            handler = new HybridEvent<TEventData>();
+        
+        handler.AddHandler(action);
+        return handler;
+    }
+
+    public static HybridEvent<TEventData> operator -(HybridEvent<TEventData> handler, Action<TEventData> action)
+    {
+        if (handler is null)
+            return null;
+        
+        handler.RemoveHandler(action);
+        return handler;
+    }
+
+    public static HybridEvent<TEventData> operator -(HybridEvent<TEventData> handler, Func<TEventData, Task> action)
+    {
+        if (handler is null)
+            return null;
+        
+        handler.RemoveHandler(action);
+        return handler;
+    }
+    
+    // Cleanup everything
+    public void Dispose()
+    {
+        _syncHandlers.Clear();
+        _asyncHandlers.Clear();
+    }
+
+    // Custom object pooling policy for List<T>
+    private class ListPolicy<T> : PooledObjectPolicy<List<T>>
+    {
+        public override List<T> Create() => new List<T>();
+        public override bool Return(List<T> obj)
+        {
+            obj.Clear();  // Clear the list before returning to pool
+            return true;
+        }
+    }
+}
+
+/// <summary>
+/// The hybrid event handler allows a given method signature to be called both
+/// synchronously and asynchronously. Built for efficiency using two separate
+/// lists of delegates, with list pooling to minimize allocations.
+/// </summary>
+public class HybridEvent : IDisposable
+{
+    // Synchronous and asynchronous handler lists
+    private List<Action> _syncHandlers;
+    private List<Func<Task>> _asyncHandlers;
+
+    // Init is false until the handler lists are initialized
+    private bool _init;
+
+    // Lock object for synchronous and asynchronous handler access
+    private readonly object _syncLock = new();
+    private readonly object _asyncLock = new();
+
+    // Object pool for list reuse
+    // This is static because it is shared across all instances of HybridEvent
+    private static readonly ObjectPool<List<Action>> SyncListPool = 
+        new DefaultObjectPool<List<Action>>(new ListPolicy<Action>());
+    private static readonly ObjectPool<List<Func<Task>>> AsyncListPool =
+        new DefaultObjectPool<List<Func<Task>>>(new ListPolicy<Func<Task>>());
+    
+    // Object pool for task list
+    private static readonly ObjectPool<List<Task>> TaskListPool =
+        new DefaultObjectPool<List<Task>>(new ListPolicy<Task>());
+
+    private void InitIfNeeded()
+    {
+        if (!_init)
+        {
+            // set up handler lists
+            lock (_syncLock)
+            {
+                _syncHandlers = SyncListPool.Get();
+            }
+            
+            lock (_asyncLock)
+            {
+                _asyncHandlers = AsyncListPool.Get();
+            }
+            
+            _init = true;
+        }
+    }
+    
+    // Add a synchronous handler
+    public void AddHandler(Action handler)
+    {
+        InitIfNeeded();
+        
+        lock (_syncLock)
+        {
+            _syncHandlers.Add(handler);
+        }
+    }
+
+    // Add an asynchronous handler
+    public void AddHandler(Func<Task> handler)
+    {
+        InitIfNeeded();
+        
+        lock (_asyncLock)
+        {
+            _asyncHandlers.Add(handler);
+        }
+    }
+
+    // Remove a synchronous handler
+    public void RemoveHandler(Action handler)
+    {
+        lock (_syncLock)
+        {
+            _syncHandlers.Remove(handler);
+        }
+    }
+
+    // Remove an asynchronous handler
+    public void RemoveHandler(Func<Task> handler)
+    {
+        lock (_asyncLock)
+        {
+            _asyncHandlers.Remove(handler);
+        }
+    }
+
+    // Invoke all synchronous handlers with list pooling to prevent allocation
+    private void InvokeSyncHandlers()
+    {
+        // Get a pooled list for copying handlers
+        var handlersCopy = SyncListPool.Get();
+
+        // Copy handlers while locking to prevent concurrent modifications
+        lock (_syncLock)
+        {
+            handlersCopy.AddRange(_syncHandlers);  // Copy handlers into pooled list
+        }
+
+        try
+        {
+            // Invoke all handlers
+            for (int i = 0; i < handlersCopy.Count; i++)
+            {
+                if (handlersCopy[i] is not null)
+                {
+                    handlersCopy[i].Invoke(); // No allocations, just iterating over the pooled list
+                }
+            }
+        }
+        finally
+        {
+            // Clear and return the list to the pool
+            handlersCopy.Clear();
+            SyncListPool.Return(handlersCopy);
+        }
+    }
+
+    // Invoke all asynchronous handlers concurrently with list pooling
+    private async Task InvokeAsyncHandlers()
+    {
+        // Get a pooled list for copying async handlers
+        var handlersCopy = AsyncListPool.Get();
+
+        // Copy handlers while locking to prevent concurrent modifications
+        lock (_asyncLock)
+        {
+            handlersCopy.AddRange(_asyncHandlers);  // Copy async handlers into pooled list
+        }
+        
+        var tasks = TaskListPool.Get();
+
+        try
+        {
+            // Invoke all async handlers in parallel using Task.WhenAll
+            for (int i = 0; i < handlersCopy.Count; i++)
+            {
+                if (handlersCopy[i] is not null)
+                {
+                    tasks.Add(handlersCopy[i].Invoke());  // Add tasks to list
+                }
+            }
+
+            await Task.WhenAll(tasks);  // Wait for all async handlers to complete
+        }
+        finally
+        {
+            // Clear and return the list to the pool
+            handlersCopy.Clear();
+            AsyncListPool.Return(handlersCopy);
+            TaskListPool.Return(tasks);
+        }
+    }
+
+    // Invoke both sync and async handlers
+    public void Invoke()
+    { 
+        _ = Task.Run(InvokeSyncHandlers);  // Call synchronous handlers first
+        _ = InvokeAsyncHandlers();  // Then call asynchronous handlers
+    }
+
+    // Enable += and -= operators for adding/removing handlers
+    public static HybridEvent operator +(HybridEvent handler, Action action)
+    {
+        if (handler is null)
+            handler = new HybridEvent();
+        
+        handler.AddHandler(action);
+        return handler;
+    }
+
+    public static HybridEvent operator +(HybridEvent handler, Func<Task> action)
+    {
+        if (handler is null)
+            handler = new HybridEvent();
+        
+        handler.AddHandler(action);
+        return handler;
+    }
+
+    public static HybridEvent operator -(HybridEvent handler, Action action)
+    {
+        if (handler is null)
+            return null;
+        
+        handler.RemoveHandler(action);
+        return handler;
+    }
+
+    public static HybridEvent operator -(HybridEvent handler, Func<Task> action)
+    {
+        if (handler is null)
+            return null;
+        
+        handler.RemoveHandler(action);
+        return handler;
+    }
+    
+    // Cleanup everything
+    public void Dispose()
+    {
+        _syncHandlers.Clear();
+        _asyncHandlers.Clear();
+    }
+
+    // Custom object pooling policy for List<T>
+    private class ListPolicy<T> : PooledObjectPolicy<List<T>>
+    {
+        public override List<T> Create() => new List<T>();
+        public override bool Return(List<T> obj)
+        {
+            obj.Clear();  // Clear the list before returning to pool
+            return true;
+        }
+    }
+}
+
+
diff --git a/Valour/Tests/Models/ChannelTests.cs b/Valour/Tests/Models/ChannelTests.cs
new file mode 100644
index 000000000..4ee82f190
--- /dev/null
+++ b/Valour/Tests/Models/ChannelTests.cs
@@ -0,0 +1,75 @@
+using Valour.Shared.Models;
+
+namespace Valour.Tests.Models;
+
+public class ChannelTests
+{
+    [Fact]
+    public void TestChannelDepth()
+    {
+        // Depth checks
+        var pos = new ChannelPosition(0x00_00_00_00);
+        
+        // Depth 0 (planet)
+        Assert.Equal(0u, pos.Depth);
+        
+        // Depth 1
+        pos = new ChannelPosition(0x01_00_00_00);
+        Assert.Equal(1u, pos.Depth);
+        
+        // Depth 2
+        pos = new ChannelPosition(0x01_01_00_00);
+        Assert.Equal(2u, pos.Depth);
+        
+        // Depth 3
+        pos = new ChannelPosition(0x01_01_01_00);
+        Assert.Equal(3u, pos.Depth);
+        
+        // Depth 4
+        pos = new ChannelPosition(0x01_01_01_01);
+        Assert.Equal(4u, pos.Depth);
+        
+        // Local position checks
+        pos = new ChannelPosition(0x01_00_00_00);
+        Assert.Equal(1u, pos.LocalPosition);
+        
+        pos = new ChannelPosition(0x01_01_00_00);
+        Assert.Equal(1u, pos.LocalPosition);
+        
+        pos = new ChannelPosition(0x01_02_00_00);
+        Assert.Equal(2u, pos.LocalPosition);
+        
+        pos = new ChannelPosition(0x01_01_01_05);
+        Assert.Equal(5u, pos.LocalPosition);
+    }
+
+    [Fact]
+    public void TestChannelPositionOperations1()
+    {
+        var parentPosition = new ChannelPosition(0x01_01_00_00u);
+        var relativePosition = 0x02u;
+
+        var appended = parentPosition.Append(relativePosition);
+
+        Assert.Equal(0x01_01_02_00u, appended.RawPosition);
+        
+        Assert.Equal(3u, appended.Depth);
+
+        Assert.Equal(2u, appended.LocalPosition);
+    }
+    
+    [Fact]
+    public void TestChannelPositionOperations2()
+    {
+        var parentPosition = new ChannelPosition(0x01_01_01_00u);
+        var relativePosition = 0xA0u;
+        
+        var appended = parentPosition.Append(relativePosition);
+        
+        Assert.Equal(0x01_01_01_A0u, appended.RawPosition);
+        
+        Assert.Equal(4u, appended.Depth);
+        
+        Assert.Equal(0xA0u, appended.LocalPosition);
+    }
+}
\ No newline at end of file
diff --git a/Valour/Tests/Valour.Tests.csproj b/Valour/Tests/Valour.Tests.csproj
new file mode 100644
index 000000000..ac101a565
--- /dev/null
+++ b/Valour/Tests/Valour.Tests.csproj
@@ -0,0 +1,38 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <EnablePreviewFeatures>True</EnablePreviewFeatures>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+        <IsPackable>false</IsPackable>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="9.0.0" />
+        <PackageReference Include="coverlet.collector" Version="6.0.2"/>
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1"/>
+        <PackageReference Include="xunit" Version="2.9.2" />
+        <PackageReference Include="xunit.runner.visualstudio" Version="3.0.0-pre.49">
+          <PrivateAssets>all</PrivateAssets>
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+    </ItemGroup>
+
+    <ItemGroup>
+        <Using Include="Xunit"/>
+    </ItemGroup>
+
+    <ItemGroup>
+      <Folder Include="Services\" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Client\Valour.Client.csproj" />
+      <ProjectReference Include="..\Database\Valour.Database.csproj" />
+      <ProjectReference Include="..\Sdk\Valour.Sdk.csproj" />
+      <ProjectReference Include="..\Server\Valour.Server.csproj" />
+      <ProjectReference Include="..\Shared\Valour.Shared.csproj" />
+    </ItemGroup>
+
+</Project>