There is an auth token, but I haven't really poked at that part of the protocol yet, so unfortunately I don't know the details.

What I'd really like to do is modify SEQ to be able to track multiple sessions at once and let you display data from multiple different sessions simultaneously. (Especially useful if you have characters in different zones, say during recovery after a raid wipe). But that's going to require MAJOR changes to how SEQ works internally. And I have no idea if it would be worth it, or if it's too niche of a use case. But I think doing that would also solve your problem.