Need some troubleshooting help with a 403 Forbidden error when testing the /api/v2/auth/oauth/token endpoint during our migration. We are mapping Zendesk SSO users to Genesys Cloud roles, but the user:read scope keeps being rejected despite correct API key permissions in v23.8. The logs show Invalid grant: scope not allowed, which is confusing since this worked fine in our Zendesk test environment. Any ideas on the specific role assignment required for this scope?
TL;DR: Check the specific OAuth client scope configuration in the Genesys Cloud admin portal.
You need to verify that the user:read scope is explicitly enabled for the specific OAuth client ID being used during the migration. The 403 error with “Invalid grant: scope not allowed” usually means the API key has the permission, but the client application itself was not granted that scope during creation or update.
In Genesys Cloud, having the role assigned to the user or service account is not enough. You must go to Admin > Security > OAuth Clients, select your client, and ensure user:read is checked under the “Scopes” tab.
If you are using JMeter for testing this flow, make sure the scope parameter in your POST body matches exactly. Also, watch out for rate limits on the token endpoint if you are ramping up concurrent requests. We hit similar issues when load testing from Singapore, and the fix was always the client scope configuration, not the user roles. Double-check the client settings.
The main issue here is likely a mismatch in the oauth client scopes. verify that user:read is explicitly enabled for the client id in the admin portal, not just the api key.