There is however now simple one-word HTTP server implementation in Crystal. In contrast to interpreted languages like Ruby and Python, I think this doesn’t make much sense in a compiled language. In Crystal, you would just build a server executable once and run that instead of compiling again every time you use it.
Btw. I’m using https://github.com/SuperPaintman/serve
Disclaimer: I don’t think it builds with current Crystal version. But it’s rather trivial, really.