HTTP Status Code Lookup
Search and filter 1xx–5xx HTTP response status codes by code number, name, or keyword with practical API usage notes.
| Code & Name | Class | Explanation | Common API Example |
|---|
About HTTP Status Codes (RFC 9110)
HTTP response status codes are grouped into five classes defined by RFC 9110: 1xx Informational (provisional response), 2xx Successful (request accepted/completed), 3xx Redirection (further action needed), 4xx Client Error (invalid request or unauthorized caller), and 5xx Server Error (upstream or server failure).