Status webhooks
Follow a call from ringing to its final status.
Set webhook_url when you place a call. Vonyx sends a POST to it each time the call's status changes:
ringingin-progress- The final status:
completed,busy,no-answerand others
The final update includes the call's duration and who ended it. Every update carries CallUUID, the call_id from the original response.
Retry safely
If placing a call returns 504, the call may still have been placed. Check your webhook for its CallUUID before retrying, so the person isn't called twice.