401

Unauthorized

Client Error

RFC 7235

The request requires user authentication.

Detailed Information

The 401 status code indicates that the request requires user authentication. The response must include a WWW-Authenticate header field containing a challenge applicable to the requested resource.

Common Examples

•Accessing protected resources
•API requests requiring authentication

Common Uses

•API requests requiring authentication
•Protected resources

Best Practices

•Use when authentication is required
•Include WWW-Authenticate header with authentication details
•Ensure proper authentication mechanisms are in place

Additional Resources

Similar Status Codes

400

Bad Request

The server cannot or will not process the request due to something that is perceived to be a client error.

402

Payment Required

Reserved for future use.

403

Forbidden

The server understood the request, but is refusing to fulfill it.

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