4×× Client Error

407 Proxy Authentication Required

Similar to 401 Unauthorized, but it indicates that the client needs to authenticate itself in order to use a proxy.

The proxy MUST send a Proxy-Authenticate header field1 containing a challenge applicable to that proxy for the target resource. The client MAY repeat the request with a new or replaced Proxy-Authorization header field2.


407 Code References

Rails HTTP Status Symbol :proxy_authentication_required

Go HTTP Status Constant http.StatusProxyAuthRequired

Symfony HTTP Status Constant Response::HTTP_PROXY_AUTHENTICATION_REQUIRED

Python2 HTTP Status Constant httplib.PROXY_AUTHENTICATION_REQUIRED

Python3+ HTTP Status Constant http.client.PROXY_AUTHENTICATION_REQUIRED

Python3.5+ HTTP Status Constant http.HTTPStatus.PROXY_AUTHENTICATION_REQUIRED

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