[d3nj4l]

You don't have to use asp.net directly in F# - there's been a long-standing library wrapping it in a more functional aesthetic with Giraffe: https://github.com/giraffe-fsharp/Giraffe

Not to discourage you or anything - always good to see alternatives. Personally, for FP web programming, the closer to the "your server as a function" ideal the better - so I'd prefer Giraffe in this case, for things like the router being an HttpHandler instead of being a property on the app instance. It's just way more intuitive from an FP standpoint and produces neater, more self-contained code, IMO.

[dimgl]

Giraffe's API looks significantly harder than OP's