ASP.NET Web API is a solid communications framework, and many applications can benefit from breaking free of IIS by including an embedded ASP.NET Web API server.

In the next sections, we’ll implement a simple web API in ASP.NET Core. After we create our API, we’ll implement a Refit client to consume it.

While .NET 8 included optimizations for Web API applications, the corporation claims that .NET 9 will extend these optimizations to other types of applications.