UCP Checker & Validator - Universal Commerce Protocol (UCP) Status

# UCP Checker > The industry standard for agentic commerce validation. Check any domain for UCP support, discover verified stores, search products, and complete purchases — all programmatically. UCP Checker is a registry, router (beta), and trust layer for the Universal Commerce Protocol (UCP). UCP is a machine-readable manifest at `/.well-known/ucp` that exposes commerce capabilities to AI agents, enabling agentic commerce. The router connects AI agents to verified UCP stores — agents can discover, search, and checkout across stores through a single MCP endpoint without integrating with each store individually. ## MCP Server UCP Checker exposes a Model Context Protocol (MCP) server for AI agents: - Endpoint: https://ucpchecker.com/mcp - Transport: HTTP (Streamable HTTP) - Authentication: None required - Schema: https://ucpchecker.com/.well-known/mcp.json - Configuration: https://ucpchecker.com/.well-known/mcp-config ### Tools - `check-domain` — Check if a domain supports UCP. Returns status, version, capabilities, latency, and AI bot policies. - `list-stores` — List verified UCP stores, optionally filtered by category and minimum score. - `list-categories` — List all available store categories with store counts. - `discover-store` — Connect to a store's MCP endpoint and list available shopping tools. - `search-catalog` — Search products on a specific UCP-enabled store. Returns titles, prices, variant IDs. - `search-all` — Search products across ALL verified UCP stores concurrently. - `search-policies` — Query store policies (return, shipping, refund, privacy, terms). - `get-product-details` — Get full product details including variant IDs for a specific product. - `add-to-cart` — Add a product variant to cart and get a checkout URL. - `build-bundle` — Add multiple items across multiple stores in one call, returns per-store checkout URLs. ### Shopping Flow 1. `list-categories` — discover available store categories 2. `list-stores`