Create a channel
POST/api/sessions/:sessionId/channels
The account becomes the channel owner, which is what makes deleting it possible later — neither engine can delete a channel it does not own.
Request
Responses
- 201
- 400
- 403
- 409
The created channel
Session not started, or validation failed
The engine refused — channel creation may be disabled for this account
The session is not connected — an engine exists for it but is not ready: disconnected, reconnecting, or still initializing, so the request never reached WhatsApp. Wait for ready and retry. A session that was never started answers 400 instead, and the session lifecycle routes answer 409 for a conflicting state rather than this. One window answers this while the session still reads ready: WhatsApp Web periodically reloads its own page and the engine re-injects into it — for those few seconds the answer is a 409 naming the reload; retry shortly.