The API landscape is diverse: REST, GraphQL, OData, gRPC, WebSockets, server-sent events, and more. This presentation will demonstrate live the advantages and disadvantages of each approach and when each style is appropriate. You will learn whether it makes sense to provide several in parallel and how common logic can be used across different interfaces. Practical examples with ASP.NET Core will show you the concepts in action. By the end, you will know which API strategy suits your project and how you can switch flexibly between the options.