What is a Response Code?

An HTTP response code (status code) is a three-digit number returned by a server indicating the outcome of the client's request. Response codes are grouped into five classes: informational (1xx), success (2xx), redirection (3xx), client error (4xx), and server error (5xx).

Response Code Classes and Proxy Relevance

The server processes the request and returns a status line containing the HTTP version, status code, and reason phrase. The code tells the client what happened: 200 means success, 301/302 indicate redirects, 403 means forbidden, 404 means not found, 407 means proxy auth required, 429 means rate limited, and 5xx codes indicate server-side failures. Proxy-aware applications should handle these codes with appropriate retry logic, rotation triggers, and error reporting based on the specific code received.

When scraping through gate.hexproxies.com:8080, your application should react differently to each code. A 200 means the request succeeded. A 403 likely means the exit IP is blocked and should be rotated. A 429 means you are sending too fast on that IP. A 503 might be a transient server issue worth retrying on the same IP after a short delay.

Building Robust Error Handling Around Response Codes

Understanding response codes is fundamental to building robust proxy-based applications. Each code requires a different handling strategy. A 429 suggests slowing down or rotating IPs. A 403 might indicate IP blocking. A 503 might be a temporary server issue worth retrying. Hex Proxies documentation includes recommended handling strategies for all common response codes encountered during proxy operations.