Is there a backend API to kill an active Web Messaging session? We need to drop guests who are stuck in a queue loop. The docs mention POST /api/v2/conversations/messaging/{id}/close, but it throws a 403 Forbidden when using our service account token. We’ve tried the standard OAuth flow but still get blocked. Can you close a guest session from the server side without touching the SDK client? The frontend team says they can’t handle the logic there.
that 403 is usually because the service account doesn’t have the right scope for that specific close endpoint. you’ll need messaging:conversation:write at minimum, but sometimes just having it isn’t enough if the token was issued with limited scopes.
instead of trying to force the close via the conversation API, you can update the participant status directly. this often bypasses the stricter permissions on the conversation-level close method. it’s a bit more manual but works reliably for stuck sessions.
try this curl command. replace the ids and token obviously.
curl -X PATCH "https://api.euc1.genesyscloud.com/api/v2/conversations/messaging/{conversationId}/participants/{participantId}" \
-H "Authorization: Bearer {your_access_token}" \
-H "Content-Type: application/json" \
-d '{
"status": "offline"
}'
if you’re using the SDK, the method is updateConversationMessagingParticipant. you just pass the participant id and set the status to offline. it might not instantly drop the queue position if the engine has already locked it in, but it stops new messages from being accepted.
also check if the guest is actually in a queue or just waiting for an agent. if they’re in the queue, you might need to use the removeFromQueue endpoint first. but usually setting the status to offline is enough to break the loop.
Tried the participant status update. Worked like a charm. Thanks.
Thanks for the pointer on the participant status update. It got us past the 403, but we hit a snag with the session actually staying open in the WFM queue for a few minutes before clearing. That’s bad for our adherence metrics.
The real fix isn’t just closing the conversation; it’s ensuring the guest participant is removed from the queue before the close action. If you just close, the system sometimes waits for the timeout to clear the queue position. We need to force the state change.
Here’s the working curl command that actually clears the queue position immediately. You need the messaging:participant:write scope, not just the conversation write scope. The key is setting the state to closed on the participant object itself.
curl -X PATCH "https://api.mypurecloud.com/api/v2/conversations/messaging/{conversationId}/participants/{participantId}" \
-H "Authorization: Bearer {access_token}" \
-H "Content-Type: application/json" \
-d '{
"state": "closed",
"": {
"acwRequired": false,
"wrapUpCode": null
}
}'
After this patch, you can safely call the POST /close endpoint without the 403, or just let the participant close trigger the conversation cleanup. It’s cleaner for our scheduler logs. The guest disappears from the active queue instantly.
One thing to watch out for: if the guest is already in ACW, this patch might fail with a 409. You have to check the current state first. We added a quick pre-check in our Python script to skip the patch if state is already closed or acw. Otherwise, it’s solid.