REST is popular, and a lot of APIs claim to adhere to this architectural style. But REST is not the best choice for every use case and also comes with some disadvantages. At first glance, REST seems to be simple. But designing a RESTful API is rather complex: Should you use POST or PUT, a slash at the end, query or path parameters? And there are even more drawbacks: the lack of a standard, REST’s technical nature, and its propensity to a data-driven design. In this session, you’ll get to know the downsides of REST and why Hypermedia is being killed by OpenAPI. Of course, you will also learn how APIs can be fixed without too many changes.