Bootic Storefronts — UCP (Universal Commerce Protocol) API

Agentic-checkout API exposed by every Bootic/Bolder storefront. A shopping agent discovers this API via GET /.well-known/ucp, then creates a checkout session, adds/updates line items, and either completes it directly or is redirected to the storefront’s hosted web checkout (continue_url) when payment requires a human-facing step the agent can’t complete on its own. All monetary amounts are integers in the currency’s minor unit (e.g. cents).

Discovery

• GET
  UCP discovery profile/.well-known/ucp

Checkout

• POST
  Create a checkout session/ucp/checkout-sessions
• OPTIONS
  CORS preflight (checkout sessions)/ucp/checkout-sessions
• GET
  Retrieve a checkout session/ucp/checkout-sessions/{id}
• PUT
  Update line items on a checkout session/ucp/checkout-sessions/{id}
• DELETE
  Cancel a checkout session/ucp/checkout-sessions/{id}
• OPTIONS
  CORS preflight (checkout session)/ucp/checkout-sessions/{id}
• POST
  Complete a checkout session/ucp/checkout-sessions/{id}/complete
• OPTIONS
  CORS preflight (complete checkout session)/ucp/checkout-sessions/{id}/complete