501
Not Implemented
5xx Server ErrorWhat It Means
The server does not support the functionality required to fulfill the request.
When You'll See It
Returned when the server does not recognize the request method or lacks the ability to fulfill it.
Related Status Codes
Frequently Asked Questions
What does HTTP 501 mean?
HTTP 501 Not Implemented means: The server does not support the functionality required to fulfill the request.
When does a server return 501?
Returned when the server does not recognize the request method or lacks the ability to fulfill it.
Is 501 a client error or server error?
HTTP 501 is a Server Error (5xx) response. This means the issue is on the server side — the server failed to fulfill a valid request.
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