Payload Structure

All Webhook requests follow a consistent structure.

Headers

Every Webhook request includes at least the following headers:

Header	Description	Example
`Content-Type`	Payload content type	`application/json`
`X-Chat-Signature`	HMAC-SHA256 signature	`4ecdcaf813c422d34413671b2ed68e0a6e69ea8496d34ab40bd33cef26571e70`

The request body is JSON. All event payloads share the following top-level fields:

Field	Type	Description	Example
`created_at`	number	Webhook send timestamp	`1765439941`
`event`	string	Event name	`UNREPLIED`
`webhook_id`	string	Unique Webhook identifier	`58946f5f583edd94f5cf87e3534d04fb`
`content`	array	Event-specific payload objects	—

The fields inside content vary by event type. See Event Types.

Your endpoint should return HTTP 200 within 5 seconds to acknowledge receipt.

If the response is not 200 or the request times out, the platform will retry delivery.