This library includes support for both BTCPay and LNbit webhooks. There are example projects for each provider, which you can use to get started. If desired, you can actually use the same server to handle both BTCPay and LNbit webhook callbacks.
BTCPay Example with Getting Started Guide
LNbits Example with Getting Started Guide
Keep in mind this is an early (untagged) release, and it's not well tested in production. The library types and implementation may change as I simplify to make this library more useful for general projects.