HTTP status codes are 3-digit numbers returned by a server in response to a client request. The first digit defines the class — 1xx informational, 2xx success, 3xx redirection, 4xx client error, 5xx server error.
Static dataset of all standardized HTTP status codes from RFC 7231, RFC 6585, and related RFCs. No network requests. Search filters against code numbers, names, and descriptions.
A backend engineer checks whether to return 422 or 400 when JSON payload fails business-logic validation.
A frontend developer looks up Retry-After behavior after hitting a 429.
A DevOps engineer investigates a 502 Bad Gateway.
Type a code number or keyword in the search box
Click a category filter — 1xx, 2xx, 3xx, 4xx, or 5xx — to narrow the list
Click any row to expand and see description, use case, and example
Use the example response to model your own API error handling
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