Getting Started with ASP.NET Core 10 Minimal APIs

What Are Minimal APIs?

Minimal APIs strip away controller ceremony and let you define endpoints directly on the WebApplication object.

Your First Endpoint

var app = WebApplication.Create(args);
app.MapGet("/hello", () => "Hello, World!");
app.Run();

Dependency Injection

Services are injected directly into route handlers — no constructor needed:

app.MapGet("/posts", async (IBlogService blog) =>
    Results.Ok(await blog.GetPublishedAsync()));

OpenAPI Support

Add Swagger with a single NuGet package and two lines of code. Your API is documented automatically.

Conclusion

Minimal APIs are production-ready in .NET 10. Give them a try on your next greenfield project.