Universal Commerce
Protocol
The common language for platforms, agents, and businesses.
UCP provides building blocks for agentic commerce across industries—from discovery to checkout and beyond—allowing the ecosystem to operate through one standard, without custom builds.
Co-developed by industry leaders
UCP is built by the industry, to enable seamless agentic experiences. It solves fragmented user journeys that lead to frustrated users and conversion drop off.
Amadeus
Booking.com
Expedia Group
Google
Hilton
Marriott
Trip.com
DoorDash
Google
Square
Toast
Uber Eats
Scalable and universal
Surface-agnostic design that scales to support any business (from small to enterprise), in every industry, across all modalities, including chat, visual commerce, and voice.
Businesses at the center
Built to facilitate commerce, ensuring businesses retain control and remain the Merchant of Record, with full ownership of customer relationships.
Open and extensible
Open and extensible by design, enabling development of community-driven capabilities and extensions across industries.
Secure and private
Built on proven security standards for account linking (OAuth 2.0) and secure payment (AP2) via payment mandates and verifiable credentials.
Frictionless payments
Open wallet ecosystem with interoperability between providers, ensuring buyers can use their preferred payment methods.
See it in action
UCP is designed to facilitate the entire commerce lifecycle, from discovery and search to final sale and post-purchase support. The protocol supports a range of core capabilities, including: Catalog Search and Lookup, Cart Building, Identity Linking, Checkout, and Order Management.
Lodging
Enables high-quality booking flows within AI surfaces—complete with real-time pricing and availability checks, smooth handling of complex rate plans, easy guest registration, and secure checkout.
Detailed specifications coming soon
Food
Powers conversational food ordering journeys that seamlessly handle nuanced meal customization, real-time availability and deals, tipping, and delivery instructions through a scalable checkout experience on AI surfaces.
Detailed specifications coming soon
Designed for the entire commerce ecosystem
For Developers
Build the future of commerce on an open foundation. Join our community in evolving an open-source standard designed for the next generation of digital commerce.
For Businesses
UCP empowers businesses to meet customers wherever they are—AI assistants, agents, embedded experiences—without rebuilding your checkout for each. You remain the Merchant of Record and your business logic stays intact.
For AI Platforms
Simplify business onboarding with standardized APIs and provide your audience with an integrated agentic commerce experience. Compatible with MCP, A2A, and existing agent frameworks.
For Payment Providers
Universal payments that are provable—every authorization backed by cryptographic proof of user consent. Open, modular payment handler design enables open interoperability and choice of payment methods.
Endorsed across the ecosystem
Accor
Adore Beauty
Adyen
Affirm
Amadeus
Amex
Ant International
Best Buy
Block
Booking.com
Bunnings
Carrefour
Checkout.com
Chewy
Choice Hotels
Commerce
DoorDash
Expedia Group
Fiserv
Flipkart
Gap
Hilton
IHG
Klarna
Kogan
Kroger
Lowe's
Macy's
Marriott
Mastercard
Paypal
Petbarn
Salesforce
SAP
Sephora
Shopee
Splitit
Square
Stripe
The Home Depot
Toast
Trip.com
Uber Eats
Ulta
Visa
VTEX
Worldpay
Wyndham
Zalando
Accor
Adore Beauty
Adyen
Affirm
Amadeus
Amex
Ant International
Best Buy
Block
Booking.com
Bunnings
Carrefour
Checkout.com
Chewy
Choice Hotels
Commerce
DoorDash
Expedia Group
Fiserv
Flipkart
Gap
Hilton
IHG
Klarna
Kogan
Kroger
Lowe's
Macy's
Marriott
Mastercard
Paypal
Petbarn
Salesforce
SAP
Sephora
Shopee
Splitit
Square
Stripe
The Home Depot
Toast
Trip.com
Uber Eats
Ulta
Visa
VTEX
Worldpay
Wyndham
Zalando
Get started today
UCP is an open standard designed to let AI agents, apps, businesses, and payment providers interact seamlessly without needing custom, one-off integrations for every connection. We actively seek your feedback and contributions to help build the future of commerce.
The complete technical specification, documentation, and reference implementations are hosted in our public GitHub repository.
