Universal Commerce Protocol (UCP)
Open standard co-developed by Google and Shopify for AI agents to discover, negotiate, and transact with any merchant across the full commerce journey.
Overview
The Universal Commerce Protocol (UCP) is an open-source standard developed by Google in collaboration with Shopify and other partners to standardize the full agentic commerce journey: discovery, consideration, purchase, order management, fulfillment, returns, and loyalty. It defines capability discovery and negotiation between agents and merchants and can compose with REST, MCP, AP2, and A2A. Note: an earlier draft referred to it as 'Universal Checkout Protocol'; the verified official name is 'Universal Commerce Protocol.' It is a Web2-oriented commerce standard.
Sato Score
59/100· MediumHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 20/35
- Code transparency
- 8/20
- Interface verifiability
- 0/10
- Docs & demo
- 10/10
- Listing transparency & provenance
- 13/15
- Independent verification
- 8/10
Independently verified — listing reviewed against evidence, never self-reported.
Details
- Chains
- Unknown
- Agent types
- Commerce Agent, Payment Protocol
- Open source
- Yes
- Pricing
- Free (open standard)
- Last checked
- 2026-07-25
Marketplace Signals
- ▸ Demo available
Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.
Where Universal Commerce Protocol (UCP) fits
Related concepts: How Agents Interact With Smart Contracts, How Agents Use Wallets, What Are Onchain Agents?
Listing History
Recorded changes to Universal Commerce Protocol (UCP)'s listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Jun 25, 2026Enriched: deployment options, has demo, marketplace notes
- Jun 25, 2026Auto-enriched: supported integrations, creator name
- Jun 25, 2026Sato Score tier: Low → MediumScore 39 → 54.
- Jun 11, 2026Sato Hub began tracking this listing
Related Resources
Model Context Protocol (MCP)
ActiveAnthropic's open standard for connecting AI systems to external tools and data sources.
ERC-8004: Trustless Agents
ActiveEthereum standard providing on-chain identity, reputation, and validation registries for AI agents.
Agent Payments Protocol (AP2)
ActiveOpen protocol from Google for secure agent-led payments across traditional and crypto rails, with a crypto-native x402 extension built with Coinbase, Ethereum Foundation, and MetaMask.
Join the Sato Hub Briefing
One email a week — the agents, tools, and infrastructure that actually shipped, and why they matter.