100 Continue
The server has received the request headers and the client should proceed.
101 Switching Protocols
The requester has asked the server to switch protocols.
103 Early Hints
Used to return some response headers before final HTTP message.
200 OK
The request has succeeded.
201 Created
The request has been fulfilled and a new resource was created.
202 Accepted
The request has been accepted for processing, but the processing has not been completed.
204 No Content
The server successfully processed the request and is not returning any content.
206 Partial Content
The server is delivering only part of the resource due to a range header.
301 Moved Permanently
This and all future requests should be directed to the given URI.
302 Found
Tells the client to look at another URL (temporary redirect).
304 Not Modified
Indicates the resource has not been modified since the version specified.
307 Temporary Redirect
The request should be repeated with another URI; the method must not change.
308 Permanent Redirect
Permanent redirect; the method must not change.
400 Bad Request
The server cannot or will not process the request due to a client error.
401 Unauthorized
Authentication is required and has failed or has not been provided.
403 Forbidden
The request was valid but the server is refusing action.
404 Not Found
The requested resource could not be found.
405 Method Not Allowed
A request method is not supported for the requested resource.
408 Request Timeout
The server timed out waiting for the request.
409 Conflict
The request could not be processed because of conflict in the current state.
410 Gone
The resource requested is no longer available and will not be available again.
413 Payload Too Large
The request is larger than the server is willing or able to process.
415 Unsupported Media Type
The request entity has a media type the server does not support.
418 I'm a teapot
The server refuses the attempt to brew coffee with a teapot.
422 Unprocessable Entity
The request was well-formed but was unable to be followed due to semantic errors.
429 Too Many Requests
The user has sent too many requests in a given amount of time.
451 Unavailable For Legal Reasons
A server operator has received a legal demand to deny access.
500 Internal Server Error
A generic error message when no more specific message is suitable.
501 Not Implemented
The server either does not recognize the request method, or it lacks the ability to fulfill it.
502 Bad Gateway
The server received an invalid response from the upstream server.
503 Service Unavailable
The server cannot handle the request (overloaded or down for maintenance).
504 Gateway Timeout
The upstream server failed to send a request in the time allowed.
511 Network Authentication Required
The client needs to authenticate to gain network access.