Yep, as you have seen the documentation is a little sparse. Currently it is just an API reference but definitely in the future we’d like to actually throw some fully-fledged guides in there to make it easier to get from 0-to-integrated.
There is actually an example repo created by @jcassee that he posted on the forums here of a command-line client written in Rust.
However that tool was written before we had API keys, which definitely make things a little easier on the client side.