[vinibrito]

If I want AI to recommend my service or product I would gladly serve some JSON it can swallow.

No need for new protocol or anything like it, just a convention, as you mentioned, similar to robot.txt.

Perhaps aidata.json.

[cairnechou]

You're totally right, "protocol" is way too heavy.

A simple convention like aidata.json is perfect. That's the "win-win" I was looking for: the site gets to clearly offer what it wants the AI to see, and the AI gets clean data instead of having to guess at brittle HTML.

aidata.json is a great name for it.