HTTP 407 Proxy Authentication Required

What is HTTP 407 Proxy Authentication Required?

The 407 (Proxy Authentication Required) status code is similar to 401 but indicates that the client must authenticate with a proxy server. The response must include a Proxy-Authenticate header field containing a challenge applicable to the proxy.

Common Use Cases

• Corporate proxy authentication
• Network gateway authentication

// PHP - cURL with proxy authentication
curl_setopt_array($ch, [
    CURLOPT_PROXY => 'http://proxy.company.com:8080',
    CURLOPT_PROXYUSERPWD => 'username:password',
    CURLOPT_PROXYAUTH => CURLAUTH_BASIC,
]);