Get detailed group info
GET/api/sessions/:sessionId/groups/:groupId
Get detailed group info
Request
Responses
- 200
- 404
- 409
- 503
Group details with participants
Group not found
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.
WhatsApp did not answer within the request budget. Deliberately not folded into the 404 above — a query that never came back is not the same claim as a group that does not exist.