It would be nice for discord bots or guild/friend groups to coordinate keys when not in the game. A server sync to communicate the list of keys can help the users that are out of the game to identify what keys the people in the group have without requiring them to login.

I was looking for the key listing db, and I am not able to locate the key listing in the folder structure. Is this kept in memory?

This would be a huge undertaking and is something I personally do not have the time and resources to do right now. It would be possible, we can dump what AK sees to the disk, but sending that to a server and making that available for consumption is not planned right now.