Sadly, I don’t know of any way to get email notification when a base (or view or table) is shared. Some people might consider this to be a small security risk in Airtable, since you have to keep checking to see if anything has been shared.
And this sort of ties into the much larger security risk here:
Unfortunately, this is fundamentally a huge challenge and a giant security issue as @ScottWorld has pointed out repeatedly in this community. As bad as this is, there is an equally bad way to detect unknown activity on a base.
A client of mine is actually entertaining this crappy idea.
Create a simple Script Block that is enticing for users to run. It could be tips, instructions, or even a Read Me that is titled “DON’T READ.ME”. :winking_face: It could also have a quick survey including - how did you find out about this base?
In that script block, capture the session data (with user IDs) and compare it to a secret table that white lists known and trusted users, post any activity that is unexpected to the secret base/log table.
Set up a monitoring process on the log table looking for users that are tagged as “uninvited”.