status code

Also written: HTTP status codes, 200, 201, 400, 404, 405, 409, 500

The number in an HTTP response that says how the request went. Common ones are 200 OK (it worked), 201 Created (a new thing was made), 400 Bad Request (bad input), 404 Not Found (no such thing), 405 Method Not Allowed (wrong method), 409 Conflict (clashes with current state, such as too little stock) and 500 Internal Server Error (the server failed).