Look at working with Live Share
Visual Studio Live Share is a new collaborative sharing tool that is currently in development for both VS and VS Code.
We are currently evaluating it, and we noticed that annoyingly, there is currently no way to have the nice dots / coverage NCrunch provides to remote guests.
There is a task / issue logged with Live Share https://github.com/MicrosoftDocs/live-share/issues/125 which they seem interested in creating an API eventually.
I think you guys should look at trying to integrate with this... as I believe Live Share looks to be on the right track at the moment... and having NCrunch integrated into Live Share at some level will be epic :D