Custom protocol in linux?

Question

I am attempting to port one of my hobby project to linux. Preferrably to Mono since it is written in C#. But I am looking into Python as well.

One of the feature of

Answer 1

Can I associate a system-wide handler like in Windows? or does it need to be browser-dependent?

It has to be browser-dependent. There's no cross-browser way of associating URL handlers in Linux.