ucp-identity-linking
UCP Identity Linking
Before writing code
Fetch live spec: Web-search site:ucp.dev specification identity-linking and fetch the page for exact OAuth requirements, scopes, and metadata format.
Also fetch https://developers.google.com/merchant/ucp/guides/identity-linking for Google's integration guide.
Conceptual Architecture
What It Enables
Identity Linking lets a Platform (AI agent) authenticate a buyer with a Business (merchant) so the agent can:
- Access the buyer's existing account (loyalty points, saved addresses, order history)
- Apply account-specific discounts or pricing
- Provide personalized checkout experiences
Protocol: OAuth 2.0 Authorization Code Flow
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