From discovery to checkout
UCPDocs helps teams ship trusted agentic commerce faster.
The Universal Commerce Protocol enables AI agents to discover, compare, and transact securely. UCPDocs gives you the handshake spec, validation tools, and playbooks to go live with confidence.
Handshake
/.well-known/ucp → services + capabilities
Agents know your checkout, fulfillment, and payment handlers instantly.
Interop Layer
One protocol, many assistants.
Connect once and reach AI search, chat, and shopping surfaces.
Trusted Checkout
Payments you already trust.
Built to work with PayPal, Google Pay, and future handlers.
UCP Handshake
Publish your .well-known/ucp file
The handshake tells AI agents what your store can do. Copy this starter file into /.well-known/ucpand update endpoints, capabilities, and payment handlers.
{
"ucp_version": "2026-01-11",
"services": {
"dev.ucp.shopping": {
"version": "2026-01-11",
"rest": {
"endpoint": "https://api.yourstore.com/ucp/v1",
"schema": "https://ucp.dev/services/shopping/openapi.json"
},
"capabilities": [
"checkout",
"fulfillment",
"discounts"
],
"payment_handlers": [
"com.paypal.ucp.v1",
"com.google.pay.v1"
]
}
}
}Health Check
Validate your UCP endpoint
Paste your domain and we will fetch /.well-known/ucpto verify the handshake metadata.
AI-ready discovery
Expose inventory and capabilities to search agents without custom integrations for every platform.
Trusted payments
UCP supports payment handlers so agents can complete checkout with existing trust rails.
Merchant control
Declare what you support, enforce guardrails, and keep fulfillment logic in your systems.
Implementation sequence
Go live in three practical moves
Publish the handshake, expose your shopping service, and connect payment handlers. That’s it.