Stuck on a 401 Unauthorized response when attempting to refresh the access token via the /oauth2/token endpoint. The grant_type is set to refresh_token, yet the platform consistently rejects the request despite the refresh token being valid and recently issued. Inspecting the response headers reveals no specific error code, just a generic authentication failure.
Make sure you are using client_credentials in the body instead of refresh_token if you are running this from a load test script, as OAuth token endpoints have strict rate limits that kill concurrent requests.
| Parameter | Value |
|---|---|
| grant_type | client_credentials |
| client_id | your_app_id |
| client_secret | your_app_secret |
This is actually a known issue with scope inheritance in Architect. The bot needs explicit wfm:schedule:write. Also, check rate limits if you run many updates. I hit 429s in JMeter tests when ramping too fast.
“401 Unauthorized: Invalid refresh token or expired credentials”
Verify the token expiry time matches your load test duration.