We would like support for webhooks on Team Server for both branch (create/delete) and revision updates.
Forum threads like this one https://forum.mendix.com/link/questions/97363 so the only other alternative is polling which seems to be a waste of resources both for the poller and for Mendix as it has to handed repeated requests to an API.
We have webhooks available for Teamserver Git (push) and Package Upload. Refer to documentation for more details – https://docs.mendix.com/developerportal/deploy/webhooks/
Let us know if you have feedback or comments on the capability.