An AI agent, like a human, needs its own autonomous identity and wallet: a public-key ID and a Bitcoin wallet.
https://i.nostr.build/fwj6g3EwP996HEVx.png
Same instinct - key as identity, wallet as scope. Portable across apps so you're not locked to one platform. Second channel (e.g. Nostr) means if one goes down you're still you.