407
Proxy Authentication Required
Client ErrorThe client must first authenticate itself with the proxy.
Category: 4xx Client Errors Standard: RFC 9110 First Appeared: HTTP/1.1
What is 407 Proxy Authentication Required?
HTTP 407 Proxy Authentication Required is a 4xx status code. The client must first authenticate itself with the proxy.
Client Request
Server
Request Rejected
Common Causes
The request was malformed or invalid
The client lacks permission or valid authentication
The requested resource or route does not exist
A precondition or content requirement was not met
Ask AI Mentor about 407 Proxy Authentication Required
Get instant help and explanation