HTTP Status Codes Reference
Comprehensive lookup for all HTTP response status codes (1xx - 5xx) with RFC definitions.
Standard response for successful HTTP requests.
Request fulfilled and new resource created.
Request processed successfully, returning no body.
Resource has been assigned a new permanent URI.
Resource resides temporarily under a different URI.
Client cached copy is up to date (ETag / If-Modified-Since).
Server cannot process request due to malformed syntax.
Authentication is required and has failed or missing.
Authenticated but lacks permission for the resource.
Requested resource could not be found on server.
HTTP method not supported for this specific endpoint.
Request conflicts with current state of target resource.
Syntax is correct but semantic instructions cannot be followed.
Rate limit exceeded. Check Retry-After response header.
Generic error message when an unexpected condition occurred.
Invalid response received from upstream backend server.
Server is temporarily down for maintenance or overloaded.
Upstream server failed to respond in time.
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