ReqRes is a bare-bones ExpressJS application that is a hosted REST-API ready to respond to your AJAX requests. You can develop with real response codes. GET, POST, PUT & DELETE supported. No more tedious sample data creation, they’ve got it covered.
Reqres simulates real application scenarios. If you want to test a user authentication system, Reqres will respond to a successful login/register request with a token for you to identify a sample user, or with a 403 forbidden response to an unsuccessful login/registration attempt. When prototyping a new interface, you just want an API there, with minimal setup effort involved.