latestOpenAPI 3.1.02026-08-155661822.2 MB

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Webhook Events

Message delivery failed event

Fired when an outgoing message fails to deliver. Currently only emitted for WhatsApp (other platforms don't expose per-message failure via webhook). The payload error object contains code, title, and message from the platform.

postWebhookmessage.failed

Payload

idstring required

event'message.delivered' | 'message.read' | 'message.failed' required

statusAtstring date-time required

When the platform reported this status.

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