I think the package you are looking for is Carter
Folks, some quick feedback. Carter wasn't quite as attractive as I guessed. It adds too much of what I call "magic plumbing" and lots of fluent methods for validation and authorisation that weren't of much use for me. I didn't want to get married to another framework without a good reason, so I skipped it and moved all my endpoint methods into a partial class: static partial class Program { public static void MapEndpoints(IEndpointRouteBuilder app, WebApplicationBuilder builder) { app.MapPost(...) { etc } // etc } } I call MapEndpoints(...) during program startup and it separates all that code into a separate file, and for a good reason ... I use a T4 template to generate about 1000 lines of repetitive app.mapxxx(...) calls into that partial file. *Greg K*