Agentic AI · Ultimate

Let an AI agent book it.

Ultimate is a machine-readable booking gateway. An AI travel agent discovers it, authenticates on behalf of a real person, and books real, money-attached inventory — over one API, in REST or MCP.

How an agent uses it

Four steps, all machine-readable. Nothing here needs a human in the loop except the one who owns the booking.

  1. 1
    Discoverread /llms.txt, the OpenAPI document, and the MCP tool manifest.
  2. 2
    Authenticatean agent key identifies the integration; a PersonFeed token identifies the human it acts for. No anonymous access.
  3. 3
    Search → holdfind bookable resources, then take an advisory, expiring hold before confirming.
  4. 4
    Bookconfirm real inventory with an idempotency key, only after the user says yes.

For people, too

The same data powers open city guidebooks and human booking.