Proxy Authentication Required

Client Error

The client must first authenticate itself with the proxy

Similar to 401 but for proxy servers

How this status code appears in HTTP responses

HTTP Response Header

HTTP/1.1 407 Proxy Authentication Required

cURL Example

curl -I https://example.com
# Returns: HTTP/1.1 407 Proxy Authentication Required

This is a client error response indicating the request contains bad syntax or cannot be fulfilled.

Other codes in the same category

The server cannot process the request due to client error

Authentication is required and has failed or has not been provided

Reserved for future use in digital payment systems