Building an API is one thing. Building a RESTful API is... something different. In this course, you'll learn how to build an API that fits the REST architectural style, with ASP.NET Core. First, you'll look into how you can correctly interact with your API by using the correct HTTP methods and status codes. Next, you'll explore validation, logging, and common functionality RESTful APIs. Then, you'll discover how to correctly use media types, and will look into versioning, caching, and handling concurrency. Finally, you'll learn protecting and documenting the API. By the end of this course, you'll have built an API with level 3 maturity, which is the highest possible level of APIs.