Question
My client credentials succeeded in the API call
POST https://na03.reltio.com/oauth/token?grant_type=client_credentials
It failed in the ROCS utility with
Answer
The tool expected the following format for the property:
CLIENT_CREDENTIALS=<Base64 encoded client_id:client_secret>
Internally, ROCS constructed the authorization header as:
Authorization: Basic <CLIENT_CREDENTIALS>
The ROCS code automatically prepended the Authorization: Basic header when invoking the OAuth endpoint.
However, if the CLIENT_CREDENTIALS value had already included the "Basic " prefix (e.g., Basic <base64 string>), the resulting header became:
Authorization: Basic Basic <base64 string>
This led to a malformed header, which caused the error observed in the logs:
"error_description": "Failed to decode basic authentication token"
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