API Webhooks for APIANT trigger

We've added 2 Knack actions on APIANT.com:


- Create Record

- Update Record

And are now trying to add triggers (when something happens in Knack) but are looking for the webhook capability to make them instant.

These are the triggers we'd like to add as webhooks:

- Deleted Record

- New Form Submission

- New Record Created

- Updated Record

Can someone point me to the API documentation where webhooks are documented?