Can you say slightly more about how you use it in Emacs? I've wondered if something like this is possible (although I'm not sure what would be useful to have it do).
It's a hacked-in-a-afternoon solution, but the gist is that I run a server in Emacs based on the emacs-web-server package[0], and I wrote some scripts that request to them.
I used Better Touch Tool[1] to add the buttons that execute the scripts.
