Hi Ranjith,
Unfortunately, the Graph API itself doesn’t provide a built-in way to include custom identifiers in webhook payloads. However, you can work around this limitation.
You can modify your webhook endpoint to accept custom headers in addition to the standard payload. When sending a message via the Graph API, include a custom header (e.g., X-Message-Origin: GraphAPI
). In your webhook handler, check this header to determine the message origin.