Whenever you create an API you probably want to be able to create some documentation around that API. Swagger has been around for a long time and allows you to explore and test your API using a nice UI in the browser. It also provides you with an OpenAPI spec in json format describing your service. OpenAPI is to REST what WSDL is to an SOAP-endpoint. Wouldn’t it be cool if you could generate your clients using that spec? Well, you can!