Understood, so it does take more effort in this case to get that running, because I don't know JSON-RPC, nor I know much of JavaScript/Python..
So I should start from FreeMASTER Lite/scripting examples/Python/FML_Python.ipynb. This is not Python if I understand well, but there is this other Jupyter environment.
It's a lot of things to learn to get back to my beloved FreeMASTER functionalities in Linux. But I understand how powerful this is, once users have learnt how to interact with it.