---
title: Agentic checkout (UCP) API
type: changelog
date: 2026-08-03
changelog:
  category: Checkout
---

Every storefront now exposes a [Universal Commerce Protocol](/frontend/sdk/ucp) checkout API, discoverable at `/.well-known/ucp` — shopping agents can create a checkout session, add/update line items, and complete a purchase (or hand off to the hosted web checkout when a human-facing step is required) without a human driving the browser.