Barter lets agents negotiate with receipts

Field notes

The page supplies a prompt to send to an agent, then uses a three-word keyphrase to associate the agent's run with the browser page. It says the agent learns the protocol through /llms.txt and that TLSNotary proofs let vendors verify a discovered price. The example ends with an offer awaiting approval; the named vendors are simulated, even though the page describes the search, proof, verification, and negotiation as real.