RuneAudio Forum

Maybe I am reading too much into this or reading it wrong, but from the Mopidy webpage:
Out of the box, Mopidy is an MPD and HTTP server. Additional frontends for controlling Mopidy can be installed from extensions.

So, it "should" be "relatively easy" for someone with the right code experience.....

Actually mopidy-tunein uses a JSON interface, but if you like you could probably also parse XML. And yes, the server answers without requesting an API key. As far as I can see tunein.py in the mentioned GitHub repository is clear enough to find the interface. All magic is done in the _tunein function. Afterwards a look at the constructor of the TuneIn class tells you what you were missing.