I would like to share with you the Webhooks app that I have just released: Webhooks app
This app allows a Nextcloud instance to call an external service via a HTTP(S) POST request every time an event of a given type occurs. The idea behind it is that you may want to integrate Nextcloud with your own system so that it is notified about certain system events. Such system could for example interact with the Nextcloud instance i.e. via the OCS API upon receiving an incoming webhook. The app supports two kinds of events: the OCP ones (such us user logged in/logged out) as well as events triggered by an admin-defined Flow.
Feature requests and pull requests are welcome (GitHub repo)! I’m looking forward to hearing your feedback.