latestOpenAPI 3.1.02026-08-205681892.2 MB

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Webhook Events

Message read event

Fired when an outgoing message is read by the recipient. Supported on WhatsApp, Facebook Messenger, and Instagram.

postWebhookmessage.read

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