AGENT PROTOCOL MAPFacts checked against their sources on October 8, 2026

UCP: Universal Commerce Protocol

An open standard for agentic commerce covering catalog, cart, checkout, identity linking and orders; it is designed to work with AP2, A2A and MCP.

UCP

At a glance

What it is for

A store publishes a profile at /.well-known/ucp.

Who runs it

An open-source project (Apache 2.0) co-developed by Google with Shopify, Etsy, Wayfair, Target and Walmart.

Where it stands

Launched in January 2026; the latest specification release is dated 25 August 2026.

Source: UCP releases (GitHub) ↗ · August 25, 2026

In Türkiye

Google’s Merchant Center help says UCP-based checkout applies only to products eligible in the United States, Canada and Australia, for select merchants. Türkiye is not listed.

Source: Google Merchant Center Help ↗ · October 8, 2026

Checked

What our free test checks

Our free test: Checked

Reads /.well-known/ucp and checks it softly: a valid JSON object with a dated version, and common setup mistakes (no signing key; placeholder signing key; signing key isn’t a valid JWK; non-standard capability name; extends a capability missing from the profile; non-https schema URL).

Requests (GET only)

/.well-known/ucp

Shown in the result as

UCP (/.well-known/ucp)

Our rules

How the test treats protocols

None of these affects the score. Adoption is still very low, so a missing file is information, not a fault.
Only GET requests to the store’s own domain, small and short. We never call an endpoint, open a session, send a POST or place an order.
A file counts only if it is a valid JSON object of the expected shape; a soft 404 page doesn’t count.
Every request is listed on our crawler page, and you can ask to have your site excluded.

Every request our crawler makes →

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