UCP Samples

Active

UCP-T-000016

Examples

Official sample implementations and examples for the Universal Commerce Protocol. Reference code for building UCP endpoints across different platforms and languages.

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Compatible Platforms

Shopify

WooCommerce

Custom

Works with 3 platforms in the UCP ecosystem.

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Related Tools

All tools

Mastercard Verifiable Intent

Security

Open specification for cryptographic agent authorization in commerce. Provides SD-JWT delegation chains that bind AI agent actions to human-approved scope with tamper-evident constraint enforcement. Supports eight constraint types including amount bounds, merchant allowlists, budget caps, and recurrence terms. Protocol agnostic with integration mappings for AP2, ACP, and UCP.

Mastercard

UCP Checker Extension

Browser Extension

Free Chrome extension that detects UCP manifests on any store you visit. Shows capabilities, payment handlers, transports, AI bot policies, and spec version in one click. Optionally contributes anonymous uptime telemetry back to UCP Checker. Works on Chrome, Edge, and Brave.

UCP Checker

UCP Conformance Tests

Validator

Official conformance test suite for validating UCP protocol compliance. Run automated checks against any UCP endpoint to verify spec adherence.

UCP Working Group