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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.

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Why this happens

The Serverless 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

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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
Authentication & Access