When it comes to web APIs, RESTful often is the default choice. But what if you need more? What if you need near real-time, duplex communication between systems? What if the client needs a lot of flexibility when querying the API backend? What if you need the best performance you can get when talking to backend Microservices? In this workshop, Rainer Stropek covers three interesting technologies that go beyond traditional, hand-coded RESTful web APIs. Together with Rainer you will dive into WebSockets with SignalR, OData and gRPC. You will only see a few slides in this workshop. The majority of the time we will work through and write code samples in C# and .NET Core.