> ## Documentation Index
> Fetch the complete documentation index at: https://wb-21fd5541-wbdocs-1882.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# 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](https://wandb.ai/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](mailto:support@wandb.com)

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<Badge stroke shape="pill" color="orange" size="md">[Authentication & Access](/support/inference/tags/authentication-access)</Badge>