Coin MCP Server is a Model Context Protocol (MCP) implementation that provides AI-powered applications with programmatic access to CoinMarketCap's cryptocurrency data. The server exposes three tools: listing-coins, get-coin-info, and get-coin-quotes. listing-coins returns a paginated list of active cryptocurrencies with the latest market data; it supports optional filters such as start (offset), limit (default 10, max 5000), price_min/price_max, market_cap_min/market_cap_max, convert (for cross-currency quotes), as well as sorting via sort and sort_dir. get-coin-info retrieves detailed information about a single cryptocurrency by id, slug, or symbol. get-coin-quotes fetches the latest market quotes for one or more coins by id, slug, or symbol. Installation is via Smithery or from source; after cloning, run uv build followed by uv pip install ., and start with python -m coin_api_mcp. The server requires a CoinMarketCap API key, supplied through the COINMARKETCAP_API_KEY environment variable or via --api-key. Claude.app users can configure the server with a JSON snippet that defines the server and provides the API key. Debugging is supported with the MCP inspector. The project is MIT licensed.