An AI assistant planning someone's journey can find your event, pay for parking and receive a valid pass, without a card, an account or a person. This works today.
An agent asks what is on sale, receives a price and a payment requirement, signs a stablecoin transfer, and gets a pass back. Four steps, no browser, no human.
1 GET /api/v1/x402/events what is on sale 2 POST /api/v1/x402/pay/{code} 402 + payment requirements 3 POST /api/v1/x402/pay/{code} signed authorization 4 → 200, pass issued, on-chain hash returned
An open protocol over HTTP 402, so an agent that can pay anywhere can pay here without integration work on either side.
/.well-known/x402 and llms.txt describe the
service where agents already look, so nobody has to be told it exists.
USDC clears in seconds. The transaction hash is on the dashboard and links to a block explorer.
An agent's purchase issues the same pass, against the same tier and the same capacity, as a person buying on the site.