UCP Checker & Validator
Check any store's Universal Commerce Protocol readiness. We fetch the live /.well-known/ucp manifest, validate it against the spec, test AI shopping-agent access, and score how ready you are for AI agents — Google AI Mode, Gemini, ChatGPT and more.
How the UCP Checker works
What is UCP (Universal Commerce Protocol)?
UCP is an open standard led by Google with Shopify, Etsy, Walmart, Target and 20+ partners. Merchants publish a single machine-readable manifest at /.well-known/ucp that declares their services, capabilities, transports (REST, A2A, MCP) and payment handlers. AI shopping agents read it to discover products, build carts and complete checkout on behalf of shoppers.
This tool fetches your live manifest, validates its structure, measures response latency, and checks whether major AI agents (GPTBot, Google-Extended, ClaudeBot, PerplexityBot and more) are allowed in your robots.txt. It rolls that into a 0–100 readiness score across three weighted areas: Discovery, Conformance and Capability.
How to improve your score
- ✓Publish a valid manifest: Serve well-formed JSON at /.well-known/ucp with a declared version, services/capabilities and at least one transport. Broken JSON or a missing manifest is an instant fail.
- ✓Unblock AI shopping agents: Accidentally disallowing GPTBot, Google-Extended or ClaudeBot in robots.txt makes your store invisible to the agents that drive AI-referred orders. Allow the agents you want to sell through.
- ✓Declare payment handlers: Discovery is not enough — to let agents actually buy, declare payment handlers and full capability coverage (search, cart, checkout, fulfillment).
UCP Checker — FAQ
What is a UCP checker?+
A UCP checker validates whether an online store is ready for AI shopping agents under the Universal Commerce Protocol. It fetches the store's /.well-known/ucp manifest, checks the structure against the spec, tests AI-agent access, and returns a readiness score.
What is a good UCP readiness score?+
Scores run 0–100 across Discovery, Conformance and Capability. 75+ means agent-ready, 40–74 means partially ready (usually discoverable but missing payment or full capabilities), and under 40 means not ready — often because there's no manifest at all.
Do I need UCP if I already do SEO or GEO?+
They solve different layers. SEO/GEO get you mentioned in AI answers; UCP makes your store transactable by AI agents so they can actually cart and check out. As AI-referred orders grow, both matter.
Why is my store showing as 'not ready'?+
The most common reason is no manifest at /.well-known/ucp, invalid JSON, or AI agents being blocked in robots.txt. Expand the checks list in the result to see exactly what to fix.
Is this tool free?+
Yes. The UCP checker is free and needs no signup. It runs a live check against your domain and shows the full breakdown.