Get all labels (WhatsApp Business only)
GET/api/sessions/:sessionId/labels
Get all labels (WhatsApp Business only)
Request
Responses
- 200
- 400
- 409
- 501
- 503
List of labels
Session not ready or not a business 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.
The active engine cannot serve this operation. It is part of the engine contract, but the engine currently running has no implementation for it.
The whatsapp-web.js page connection died mid-read, so nothing could be read. Retry once the session is ready again.