Idempotent sessions
Agents can safely retry checkout creation and completion with stable idempotency keys.
Agent-first commerce middleware for autonomous shopping agents.
UCP and ACP Checkout
UCP and ACP checkout with idempotent sessions, hosted approval, payment proof, and a stable agent commerce state machine.
Hosted approval
When approval is required, the buyer receives an approval URL before completion can continue.
Payment proof
Completed sessions expose approval IDs and protocol metadata for auditability.