Articles/HTTP

HTTP 407 Proxy Authentication Required — What It Means

What HTTP status code 407 Proxy Authentication Required means, when servers return it, and how to handle it correctly.

Published September 24, 2026

HTTP 407 Proxy Authentication Required — The client must authenticate with a proxy before the request can proceed.

Key points

  • Means an intermediate proxy server requires authentication before forwarding the request
  • Paired with a Proxy-Authenticate header
  • Mostly encountered in corporate or ISP-level proxy setups, rarely in typical web development
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