Common HTTP Status Codes
1XX: Informational
Notes: 1xx status codes indicate provisional responses, such as 100 Continue or 101 Switching Protocols.
100 Continue
The server has received the initial part of the request and is waiting for the client to send the remainder.
101 Switching Protocols
The client has asked the server to change protocols and the server has agreed to do so.
102 Processing
The server has received and is processing the request, but that it does not have a final response yet.
2XX: Successful
Notes: 2xx status codes indicate that the client's request was successfully received, understood, and accepted. Examples include 200 OK or 201 Created.
200 OK
The request was successful.
201 Created
The request has been fulfilled, and a new resource has been 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 but isn't returning any content.
3XX: Redirection
Notes: 3xx status codes indicate that further action needs to be taken to complete the request. Examples include 301 Moved Permanently or 302 Found.
300 Multiple Choices
Indicates that there exist multiple options for the resource at the server that the client may choose from.
301 Moved Permanently
The requested resource has been permanently moved to a new location.
302 Found (Previously "Moved Temporarily")
The requested resource has been temporarily moved to a different URI.
304 Not Modified
The client's cached copy is still valid and the server does not need to send a new copy.
4XX: Client Error
Notes: 4xx status codes indicate that there was an error on the client's end. Examples include 400 Bad Request or 404 Not Found.
400 Bad Request
The server could not understand the request due to invalid syntax.
401 Unauthorized
Authentication is required and has failed or has not yet been provided.
403 Forbidden
The client does not have permission to access the requested resource.
404 Not Found
The requested resource could not be found on the server.
407 Proxy Authentication Required
The client must first authenticate itself with the proxy to make a successful request with to the server.
408 Request Timeout
The server timed out waiting for the request from the client.
5XX: Server Error
Notes: 5xx status codes indicate that there was an error on the server's end. Examples include 500 Internal Server Error or 503 Service Unavailable.
500 Internal Server Error
A generic error message indicating that something went wrong on the server's end.
501 Not Implemented
The server does not support the functionality required to fulfill the request.
502 Bad Gatewa
The server received an invalid response from an upstream server.
503 Service Unavailable
The server is currently unable to handle the request due to temporary overload or maintenance of the server.
504 Gateway Timeout
The server, while acting as a gateway or proxy, did not receive a timely response from the upstream server.
