HTTP 407 Proxy Authentication Required is the proxy equivalent of 401 Unauthorized. It indicates the client must authenticate with an intermediate proxy server before the request can proceed to the destination. The proxy MUST include a Proxy-Authenticate header specifying the authentication scheme. This is common in corporate networks with authenticating proxies.
Response includes the status code, standard headers (including Content-Type), and a small diagnostic JSON body describing the request and returned status.
Simulator URL (copy in the app after load — not a normal link):
https://httpstatus.com/api/status/407
Example request:
curl -i "https://httpstatus.com/api/status/407"