# UCP Checker Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## UCP Checker

Search products across verified online stores and check if stores support Universal Commerce Protocol.

- Record: https://musedirectory.ai/connector/ucp-checker
- Category: Shopping & Commerce
- Developer: ucpchecker.com (https://ucpchecker.com/agents)
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 732ms, checked 2026-09-28T08:15:47Z
- Endpoint: https://ucpchecker.com/mcp
- Auth: No account needed; Pricing: unknown
- Screening: Screened, no issues found (2026-09-24T21:10:36Z)
- Source: Found in the official MCP Registry (com.ucpchecker/ucp-checker) https://registry.modelcontextprotocol.io/v0/servers?search=com.ucpchecker%2Fucp-checker

Connects to UCP-enabled storefronts to search product catalogs, discover available shopping tools, and retrieve store policies. Read-only access to verified Shopify, Wix, WooCommerce and other platform stores. No authentication required.

Example request: "Search for running shoes across multiple verified stores and show me which ones have them in stock."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use UCP Checker to help me. It is a free service with an MCP server at https://ucpchecker.com/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- list-stores:  List verified UCP storefronts across every platform, best-evidenced first. Use when the user wants to browse stores — e.g., "what stores can I shop at?" or "show me Wix stores". To find stores that sell something, prefer search-all. Each store carries what we have actually obser
- list-categories:  List store categories with store counts. Categories exist only for the deeply audited subset of verified stores, so this is a way to browse, not the whole index: list-stores and search-all cover every verified storefront. Sorted by number of stores (most 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
- 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 verified UCP stores at once. Fans the query out, concurrently, to the stores whose observed catalogue best matches it, and returns results grouped by store with each store's UCP score and evidence. Rare query words count for more than common ones. If n
- 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 
- 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", product

Screening checks:
- MCP handshake: pass (Answered in 355ms)
- Domain against threat feeds (Cloudflare security DNS): pass (ucpchecker.com not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (8 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 250 days ago)
- AI review of purpose and tool behavior: pass (No concerns)