MCP server · Prime Roots

prime-roots-ucp

Prime Roots operates a hosted, remote MCP endpoint as part of its Shopify storefront implementation of the Universal Commerce Protocol (UCP, https://ucp.dev). Agents POST JSON-RPC to the endpoint and call the MCP tools/list method to discover tool schemas at runtime. Checkout requires contemporaneous human buyer approval; agents must not complete payment without explicit consent. The endpoint is rate-limited per IP (back off on 429). Tool names below are taken verbatim from the documented agent flow in llms.txt; the authoritative, versioned schema is served by tools/list and by the UCP OpenRPC schema referenced from the discovery document.

Open endpoint → Prime Roots provider profile

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Provider: Prime Roots Type: Hosted endpoint Transport: http Host: www.primeroots.com

Endpoint

https://www.primeroots.com/api/ucp/mcp

Hosted endpoint · transport http

Connect

This is a remote MCP server — point an MCP client at the endpoint URL. Clients with native remote support (Claude, Cursor, VS Code, …):

# mcp client config (e.g. .mcp.json / mcp settings) { "mcpServers": { "prime-roots": { "url": "https://www.primeroots.com/api/ucp/mcp" } } }

For stdio-only clients (older Claude Desktop, etc.), bridge with mcp-remote:

# Add to claude_desktop_config.json { "mcpServers": { "prime-roots": { "command": "npx", "args": ["-y", "mcp-remote", "https://www.primeroots.com/api/ucp/mcp"] } } }

If the server requires authentication, add the provider's token/header (e.g. an X-API-Key) per its docs. A quick reachability check:

curl -i -X POST https://www.primeroots.com/api/ucp/mcp \ -H "Content-Type: application/json" -H "Accept: application/json, text/event-stream" \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Tools

search_catalog — Find products matching the buyer's intent (UCP dev.ucp.shopping.catalog.search).
create_cart — Create a cart and add desired items (UCP dev.ucp.shopping.cart).
create_checkout — Start the purchase flow (UCP dev.ucp.shopping.checkout).
update_checkout — Set shipping address and fulfillment method (UCP dev.ucp.shopping.fulfillment).
complete_checkout — Finalize the order; buyer must approve payment (UCP dev.ucp.shopping.order).

About MCP

The Model Context Protocol (MCP) is an open protocol Anthropic introduced for connecting LLM-based agents to external tools and data sources. Providers publish MCP servers that expose their API surface as structured, discoverable tools — an MCP-compatible client (Claude Desktop, Cursor, Cline, Continue, etc.) can connect to the server and call its tools without any per-provider integration code.

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