HTTP 501 Not Implemented

What 501 means

Usually the server does not recognize the request method at all.

Common causes

• An unsupported HTTP method.

How to fix it

1. Use a supported method, or implement the feature on the server.

How to check a status code

Enter a URL in the HTTP Status Checker to see its status code, every redirect hop, and response time. For redirect-heavy pages, the Website Speed Test shows how much time redirects add.

FAQ

What does HTTP 501 mean?

501 Not Implemented is a 5xx server error status code. The server does not support the functionality needed to fulfil the request.

What causes a 501 error?

An unsupported HTTP method.

How do I fix HTTP 501?

Use a supported method, or implement the feature on the server.