Webhook Events

Call failed event

Fired when a call setup or in-progress call fails (Meta rejected the connect, Telnyx returned an error, etc.). Payload carries the upstream error code and message.

postWebhookcall.failed

Payload

idstring required

event'call.failed' required

timestampstring date-time required

UTC time at which Zernio generated this event (set once when the event payload is built, before delivery is queued). Retries and redeliveries keep the original value, so it reflects the event, not the delivery attempt.

Response

Webhook received successfully

Changes

Webhooks have no change history: a webhook is keyed by its event name rather than a path and method, so no recorded change can name it.