Hi eBay Dev Team,
I'm encountering a persistent issue with my sandbox OAuth credentials.
App ID: ShaheerM-SpireTec-SBX-1f72598d8-fc088b27
Cert ID (after rotation): SBX-f71a54621e1c-5e1d-4424-9d12-90ac
Even after rotating the Cert ID, I keep getting:
401 Unauthorized – {"error": "invalid_client", "error_description": "client authentication failed"}
This is preventing me from retrieving an access token via the /oauth2/token endpoint.
I've verified the credentials are base64 encoded correctly, scopes are valid, and I’ve tested with both `client_credentials` and `authorization_code` grant types.
Please advise or issue a working sandbox keyset so I can continue testing.
Thanks,
Shaheer Mahmood
