I would do it with pure builtin asyncio Library. Python's standard library is enough to create a Restful API, I think. There's everything builtin already. I wrote a couple of blog posts about it, you can read and let me know what you think about it.

This is initial blog post, about creating a raw web server https://fatih-erikli.com/creating-a-web-server-in-asyncio.ht...

This is some boilerplate for creating a router and endpoints etc. https://fatih-erikli.com/asyncio-boilerplate.html

And this is about interacting with other services such as Redis, Mongo, etc. https://fatih-erikli.com/asyncio-streams.html