# Google Universal Commerce Protocol

**Canonical:** https://apis.io/apis/google-pay/google-universal-commerce-protocol/  
**Provider:** Google Pay — https://apis.io/providers/google-pay/  
**Base URL:** https://pay.google.com/  
**Documentation:** https://developers.google.com/merchant/ucp

Google Universal Commerce Protocol is one of 9 APIs that [Google Pay](https://apis.io/providers/google-pay/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Agentic Commerce, Checkout, Commerce, and Merchants. The published artifact set on APIs.io includes API documentation and a getting-started guide.

A standard for securely and efficiently exchanging commerce data between merchant and platform systems to enable checkout experiences directly on Google surfaces including Search and Gemini. Merchants implement REST endpoints for session creation, updates, and completion.

## Machine-readable artifacts (2)

- **Documentation** — https://developers.google.com/merchant/ucp/guides
- **GettingStarted** — https://developers.google.com/pay/api/universal-commerce-protocol/overview

## Other Google Pay APIs (8)

- [Google Pay API](https://apis.io/apis/google-pay/google-pay-api/)
- [Google Pay API for Android](https://apis.io/apis/google-pay/google-pay-api-for-android/)
- [Google Wallet API](https://apis.io/apis/google-pay/google-wallet-api/)
- [Google Pay Facilitated Transaction Event API](https://apis.io/apis/google-pay/google-pay-facilitated-transaction-event-api/)
- [Google Pay Virtual Cards API](https://apis.io/apis/google-pay/google-pay-virtual-cards-api/)
- [Google Pay Push Provisioning API](https://apis.io/apis/google-pay/google-pay-push-provisioning-api/)
- [Google Pay Payment Card Recognition API](https://apis.io/apis/google-pay/google-pay-payment-card-recognition-api/)
- [Google Pay India Merchant SDK](https://apis.io/apis/google-pay/google-pay-india-merchant-sdk/)

## Tags

Agentic Commerce, Checkout, Commerce, Merchants

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/google-pay/google-universal-commerce-protocol/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/google-pay/.