MCP server · Uppercase

uppercase-storefront-ucp

The uppercase storefront (Shopify) publishes a live agent-commerce surface via the Universal Commerce Protocol (UCP): the merchant profile at /.well-known/ucp advertises a dev.ucp.shopping service with transport "mcp". The MCP endpoint answers JSON-RPC (probed 2026-07-21: tools/list responds but requires an agent profile URI for UCP discovery before listing tools). The tool flow below is captured verbatim from the store's own /llms.txt and /agents.md agent instructions; the full tool schema is published as OpenRPC by UCP. Checkout completion requires explicit buyer approval.

Open endpoint → Uppercase provider profile

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Provider: Uppercase Type: Hosted endpoint Transport: http Host: uppercase.co.in

Endpoint

https://uppercase.co.in/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": { "uppercase": { "url": "https://uppercase.co.in/api/ucp/mcp" } } }

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

# Add to claude_desktop_config.json { "mcpServers": { "uppercase": { "command": "npx", "args": ["-y", "mcp-remote", "https://uppercase.co.in/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://uppercase.co.in/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 (documented in /llms.txt agent flow).
create_cart — Create a cart and add desired items.
create_checkout — Start the purchase flow.
update_checkout — Set shipping address and method.
complete_checkout — Finalize the purchase (buyer must approve payment).

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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