The Sinch Voice platform delivers real-time call event notifications to a configured webhook URL via HTTP POST requests. The receiving endpoint responds with SVAML commands that control the ongoing call flow.
Webhook requests conform to the CloudEvents 1.0 specification using HTTP binary content mode:
- CloudEvent metadata is carried as
ce-*HTTP headers (see parameters below). - The request body contains only the event data payload (
callobject), encoded asapplication/json.