MCP server · Checkmate

openstock

OpenStock by Checkmate — "the world's largest MCP for ecommerce." A single Model Context Protocol server that exposes catalogues, offers, and merchant-backed discount-code generation across the entire Checkmate network of 284,000+ merchants through one endpoint. Speaks MCP natively and works out of the box with any MCP-compatible client (Claude, ChatGPT, Cursor, custom agents). Requires partner developer access.

Open endpoint → Checkmate provider profile

One-click install for Cursor, VS Code, Claude, and 20+ other MCP clients, powered by API Commons MCP Install — visit install.apicommons.org for more information.

Provider: Checkmate Type: Hosted endpoint Transport: http Host: mcp.joincheckmate.com

Endpoint

https://mcp.joincheckmate.com

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": { "checkmate": { "url": "https://mcp.joincheckmate.com" } } }

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

# Add to claude_desktop_config.json { "mcpServers": { "checkmate": { "command": "npx", "args": ["-y", "mcp-remote", "https://mcp.joincheckmate.com"] } } }

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://mcp.joincheckmate.com \ -H "Content-Type: application/json" -H "Accept: application/json, text/event-stream" \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Tools

list_brands — Browse the network — discover 284,000+ live merchants across beauty, apparel, wellness, home and more behind a single connection.
get_catalogue — Pull live catalogues — read structured product data, variants, imagery and inventory directly from the source, kept fresh in real time.
search_offers — Surface live offers — query active promotions and best available pricing across the entire network in a single call.
generate_code — Generate real merchant-backed discount codes on demand.
check_availability — Confirm availability — validate stock and eligibility before an agent recommends a product.
attribute_order — Attribute and convert — close the loop with clean attribution back to the merchant.

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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