Free HTTP Status Codes

Continue

Request received; continue sending the body.

Switching Protocols

Server is switching protocols.

OK

Request succeeded.

Created

Resource created successfully.

Accepted

Request accepted for processing.

No Content

Success with an empty response body.

Moved Permanently

Resource has a new permanent URI.

Found

Temporary redirect to another URI.

Not Modified

Cached version is still valid.

Temporary Redirect

Retry with same method at new URI.

Permanent Redirect

Permanent redirect, keep method.

Bad Request

Malformed or invalid request.

Unauthorized

Authentication is required.

Forbidden

Authenticated but not allowed.

Not Found

Resource does not exist.

Method Not Allowed

HTTP method not supported here.

Request Timeout

Client took too long to send.

Conflict

Request conflicts with current state.

Gone

Resource permanently removed.

Unsupported Media Type

Payload format not supported.

Unprocessable Entity

Semantics are invalid.

Too Many Requests

Rate limit exceeded.

Internal Server Error

Unexpected server failure.

Not Implemented

Server does not support the method.

Bad Gateway

Invalid response from upstream.

Service Unavailable

Server temporarily overloaded.

Gateway Timeout

Upstream did not respond in time.