That’s a great question… But I have no clue if its exposed or not. The thing is, apparently they fixed it in a way that it should, in theory, work out of the box.
HomeAssistant should be running on 8123 if I’m not mistaken.
I’ve tried [virtual adapter]:8123 (not at my PC atm, don’t know the op by heart sry) localhost:8123 and 127.0.0.1:8123
It does work with epub now. They changed it not long ago (afaik)