API error code 401 - Authentication failed

A 401 error with the message “Authentication failed” means your authentication credentials are incorrect or your W&B project entity and/or name are incorrect.

Why this happens

The W&B Inference API requires valid authentication credentials to process requests. This error occurs when:

• Your API key is invalid, expired, or revoked
• Your W&B project entity name is incorrect
• Your W&B project name is incorrect

What you can do

1. Verify your API key

   • Check that you’re using the correct API key for your account
   • Regenerate your API key if needed from your W&B settings

2. Check your project details

   • Ensure your W&B project entity (organization or username) is correct
   • Verify that the project name matches an existing project

3. Contact support

   • If the issue persists after verifying your credentials, reach out to W&B support

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Inference API Errors