Server Error Status Codes in HTTP
From the HTTP Status Codes cheat sheet · 5xx Server Errors · verified Jul 2026
Server Error Status Codes
Errors occurring on the server side
javascript
500 : Internal Server Error - Generic server failure
501 : Not Implemented - Feature not supported
502 : Bad Gateway - Invalid upstream response
503 : Service Unavailable - Temporary overload/maintenance
504 : Gateway Timeout - Upstream timeout
507 : Insufficient Storage - Server storage full💥 500 is the catch-all for unexpected errors
🔧 503 with Retry-After header for maintenance
⏱️ 502/504 indicate proxy or gateway issues
📌 Log 5xx errors for debugging and monitoring
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