HTTP Status Monitor: Complete Guide to Server Response Codes

HTTP status codes communicate the outcome of server requests and are crucial for diagnosing website issues. Our HTTP Status Monitor continuously tracks server responses, helping you identify and resolve problems before they impact users. HTTP status codes are three-digit numbers organized into five categories. 2xx Success codes like 200 OK for standard successful requests, 201 Created for successfully created resources. 3xx Redirection codes like 301 Moved Permanently for SEO-friendly permanent redirects, 302 Found for temporary redirects, 304 Not Modified when cached version is still valid. 4xx Client Errors like 400 Bad Request for invalid syntax, 401 Unauthorized requiring authentication, 403 Forbidden for access denied, 404 Not Found when resource doesn't exist, 429 Too Many Requests when rate limit exceeded. 5xx Server Errors like 500 Internal Server Error for generic failures, 502 Bad Gateway for invalid upstream response, 503 Service Unavailable when temporarily overloaded, 504 Gateway Timeout when upstream server didn't respond. Common issues include 404 errors from broken links requiring 301 redirects and custom error pages, 500 errors from code bugs requiring debugging and increased resources, and 503 errors from server overload requiring load balancing and DDoS protection.