HTTP Status Code Reference
EssentialFast reference for HTTP response codes (1xx Informational, 2xx Success, 3xx Redirection, 4xx Client Errors, 5xx Server Errors) with troubleshooting guides.
The request has succeeded.
The request succeeded and a new resource was created.
The server successfully processed the request and returns no content.
The target resource has been assigned a new permanent URI.
Client can use cached version of the resource.
Server cannot process request due to client syntax error.
Authentication credentials required or invalid.
Server understood the request but refuses to authorize it.
The server cannot find the requested resource.
Rate limit exceeded. Client has sent too many requests in given time.
Unexpected server error preventing request completion.
Invalid response from upstream server gateway.
Server is temporarily down for maintenance or overload.