Buy Me a Coffee Webhooks
Server-push HTTP webhooks configured in the dashboard (Integrations - New webhook). Buy Me a Coffee POSTs a JSON event envelope to a subscriber URL for donation, membership / recurring-donation, extra purchase, commission, and wishlist events. Each request is signed with an HMAC-SHA256 signature in the x-signature-sha256 header. This is server-to-endpoint HTTP, not a WebSocket.