Webhook Events

Message sent event

Fired when a message is sent via the API, or from the WhatsApp Business app on Coexistence numbers. Sends that carry platform-specific context deliver it under metadata, so a quote-reply arrives with metadata.quotedMessageId and mirroring CRMs can thread it without a lookup.

postWebhookmessage.sent

Payload

idstring required

Stable webhook event ID

event'message.sent' 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.