Genesys Cloud Webhook to Slack: 403 Forbidden on Queue SLA Breach Events

NICE CXone API & Integrations
1 
403 Forbidden
"message": "Access denied. The request was denied due to insufficient permissions."

I am trying to configure a webhook in Genesys Cloud to trigger a Slack notification whenever a queue breaches its SLA targets. My setup uses the routing/queues/queueId/statistics/realtime endpoint logic, but I am hitting a wall with the OAuth token validation in the webhook payload.

Here is my current configuration:

webhook:
 name: "SLA Breach Alert"
 enabled: true
 url: "https://hooks.slack.com/services/T00000000/B00000000/XXXXXXXXXXXXXXXXXXXXXXXX"
 method: "POST"
 headers:
 Content-Type: "application/json"
 conditions:
 - type: "routing"
 event: "queue_stats"
 filter:
 - key: "queue.sla.breached"
 op: "eq"
 value: "true"
 payload:
 text: "Queue {{queue.name}} has breached SLA! Current wait: {{queue.stats.waitTime}}"

The issue seems to be related to authentication. The webhook documentation mentions that for internal routing events, the system uses a service account token. However, my Slack endpoint is external. I suspect the Genesys platform is trying to authenticate the outbound request using a token that lacks the routing:queue:view permission, or perhaps the webhook is not configured to use the OAuth client credentials flow correctly.

  1. I have verified the Slack URL is correct by testing with curl.
  2. I have assigned the routing:queue:view and routing:queue:edit permissions to the OAuth client associated with this webhook.
  3. The webhook status in the UI shows “Active”, but the logs show the 403 error immediately upon trigger.

Is there a specific OAuth scope I am missing? Or do I need to structure the webhook payload differently to bypass the strict permission checks for external endpoints? Any code snippets for a working webhook configuration would be appreciated.