So the restful-harmony app in development mode mimics being connected to a hub without supplying any ip or harmony login info. No account or actual hub needed. It will return actual data (Captured from my hub of course) and respond to all commands. Hope that sheds some light on the update.
Development mode added to the restful-harmony app...
https://github.com/bwssytems/restful-harmony/releases/download/v0.1.4/restful-harmony-0.1.4.jar
Instructions here: https://github.com/bwssytems/restful-harmony
So, if you look at the https://github.com/bwssytems/restful-harmonyit lays out the API from this bridge. There is information out there on handling the Harmony API, but it requires you to keep track of a token from logitech.com sign in. That is what this bridge does for you. It is just helper. If you need some dumps from the list calls I can get that for you.