Maker API includes the room in the output for a device (I've tested this myself and can see a "room" value come through):
There was talk on a 2 year old topic about a room listing available to Apps, but given the age of the post and the likelihood for change in that time, I would want to get more up-to-date detail, which I don't have. Either way, that is likely not what you are looking for, at least as a first option.
