UCP Checker

List Stores

List verified UCP stores, optionally filtered by category and minimum score. Use when the user wants to shop by category — e.g., "find me a pet store" or "what shoe stores are available?" Returns stores sorted by score (highest first) with domain, category, score, and grade.

List Categories

List all available store categories with store counts. Use to discover what kinds of stores are available before narrowing down. Returns categories sorted by number of stores (most stores first).

Check Domain

Check if a domain supports Universal Commerce Protocol (UCP). Returns the UCP status, manifest version, capabilities, response latency, and AI bot access policies (GPTBot, ClaudeBot, Google-Extended, etc.). If the store's edge rate-limits the live attempt, the result says so and reports the last OBSERVED state and when it was observed — an unobserved attempt is never presented as a verdict about the store. The domain is automatically normalized (removes protocol, www,

Discover Store

Discover available shopping tools on a UCP-enabled store. Connects to the store's MCP endpoint and lists all available tools (search, cart, shipping, etc.). Use this to understand what a store supports before shopping. Example: domain: "allbirds.com"

Search Catalog

Search for products on any UCP-enabled Shopify store. Searches the store's live product catalog via UCP/MCP and returns matching products with titles, prices, variants, and images. Examples: - domain: "allbirds.com", query: "tree topper" - domain: "gymshark.com", query: "hoodie"

Search All

Search for products across the highest-scoring verified UCP stores at once. Fans out the query to multiple stores concurrently and returns aggregated results grouped by store. Stores are chosen from the same vetted, scored set list-stores returns (best scores first). Pass `category` to focus the fan-out — e.g. "footwear" for "running shoes". Slow/failing stores are skipped gracefully. Example: query: "running shoes", category: "footwear", maxStores: 5

Search Policies

Search store policies on any UCP-enabled Shopify store. Query return policies, shipping policies, refund policies, privacy policies, terms of service, or any other store policy. Returns the matching policy text. Use this when a user asks about a store's policies before or after purchase — e.g., "what is the return policy?", "do they offer free shipping?", "refund window?" Example: domain: "allbirds.com", query: "return policy"

Get Product Details

Get full product details including variant IDs from a UCP-enabled store. Use after search-catalog to see a product's full declared detail, including its variants. Pass the Product ID from search results to get all variants with their IDs. Example: domain: "allbirds.com", productId: "gid://shopify/Product/123456"