Is there a backend API to kill an active Web Messaging session? We need to drop guests who are stuck in a queue loop. We’ve looked for a way to close the conversation via API, but we’re having trouble finding the correct endpoint or permissions. 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.
3 Likes
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.
Unfortunately, the Genesys Cloud Platform API v2 spec does not expose a direct endpoint to patch the state of a specific messaging participant to closed or to close a conversation via a simple POST /close path. The available endpoints for web messaging are primarily for retrieving messages (GET /api/v2/webmessaging/messages) and managing knowledge guest sessions.
Because there is no API path to manually force the participant state change or close the conversation programmatically in the way we needed, we had to adjust our approach. We now rely on the standard conversation lifecycle events. Instead of trying to patch the participant state directly, we monitor the conversation status via the Webhooks. When the conversation transitions to Closed or Disconnected, we trigger our internal cleanup logic to clear the queue position in our WFM integration immediately, rather than waiting for the platform’s internal timeout.
One thing to watch out for: if the guest is already in ACW, the conversation close event might be delayed. You have to check the current state first. We added a quick pre-check in our Python script to handle the acw state specifically in our local logs. Otherwise, it’s solid.