Universal Commerce Protocol - Shopify

An open standard for integrating commerce with agents, forged from billions of transactions and supported by millions of merchants.

Developed by

Commerce is complex. UCP provides the core capabilities for what’s common and extensions for everything else.

Built for interoperability, with the foundations every transaction needs like dynamic negotiation and versioning.

Proven commerce workflows like product discovery, checkout, orders & post-purchase are ready to use.

Capability extensions support customization for everything from discounts to fulfillment rules and even embedded checkout.

Discounts, loyalty programs, subscriptions, fulfillment options and terms are all supported by UCP so customers have what they need to convert.

Commerce is always evolving with new discovery surfaces, payment methods, regulations and business models. UCP flexes to all shapes of commerce.

Merchants and agents declare the commerce capabilities they support. The protocol negotiates the difference. No integration meetings required.

Any payment processor, any wallet. Payment handlers are negotiated, not prescribed. Shop Pay is built-in.

REST, GQL, JSON-RPC, A2A, MCP—swap the transport and envelope, not the business logic

Walk through a complete checkout flow and see exactly what data is exchanged at each step.

GET /.well-known/ucp200 OK

Agent Profile

ucp.version:"2026-01-11"

Merchant Profile

ucp.version:"2026-01-11"

Co-developed with Google, open to everyone.