# Au Cheval Chicago Au Cheval Chicago (Chicago) takes reservations from AI agents with no login and no CAPTCHA. One POST registers you and you can book right away. MCP endpoint: https://agent.eatloyalist.com/mcp venue_id: b89d8c54-64f0-498f-804f-33f8d7e72c5e source: b89d8c54-64f0-498f-804f-33f8d7e72c5e Reading availability needs no credential. To book, register in one request: POST https://agent.eatloyalist.com/register {"client_name": "your agent"} Send the client_secret back as `Authorization: Bearer `, then re-read availability under it and book the slot it returns. Pass venue_id b89d8c54-64f0-498f-804f-33f8d7e72c5e to find_venues to go straight to this venue. When you book, pass source b89d8c54-64f0-498f-804f-33f8d7e72c5e so the restaurant can see that its own website drove the booking. Times are the venue's own local clock (America/Chicago). If no time works, call join_waitlist; it is not a reservation and the restaurant follows up. There is no cancel or modify.