Coincap MCP

What the QuantGeekDev/coincap-mcp MCP server does

The QuantGeekDev/coincap-mcp MCP server exposes selected CoinCap cryptocurrency data through MCP tools. It is designed for agents that need to answer questions about crypto prices or discover which assets are available from CoinCap.

The included capabilities cover three use cases:

• Looking up Bitcoin’s price with a dedicated Bitcoin-focused tool.
• Retrieving the price of another cryptocurrency supported by CoinCap.
• Listing the crypto assets available through the CoinCap API.

The repository description also identifies the integration as a source of market information, and the README uses price, asset availability, and market-cap questions as example prompts.

How it works

The process runs locally and sends requests to CoinCap’s public API. No API key, account registration, or credential configuration is described as necessary. An MCP-compatible client starts the process, discovers its tools, and passes requests from the agent to the relevant CoinCap operation.

The server is implemented as a Node.js project. The documented prerequisites are Node.js 18 or later and npx. Its API access is read-oriented in the documented tool set: the README describes price retrieval and asset listing, not account actions or cryptocurrency transactions.

Setup and configuration

To run the QuantGeekDev/coincap-mcp MCP server with Claude Desktop, add an MCP server entry to Claude Desktop’s configuration file. On macOS, the documented location is ~/Library/Application Support/Claude/claude_desktop_config.json; on Windows, it is %APPDATA%/Claude/claude_desktop_config.json.

A direct local configuration uses npx to launch the coincap-mcp package. The repository also documents Smithery as an automated installation option for Claude Desktop, but that installer is separate from the server’s own runtime command.

For local development, install the npm dependencies with npm install, create the build with npm run build, and use npm run watch for automatic rebuilds during development. The README also shows a Claude Desktop configuration that starts the generated build/index.js file directly.

Tools and capabilities

The documented tools are:

• Bitcoin price lookup: Returns the price for Bitcoin through a purpose-built API call.
• Crypto price lookup: Retrieves the price of a cryptocurrency available from CoinCap.
• Asset listing: Returns the collection of crypto assets exposed by CoinCap.

These tools support prompts such as asking for Bitcoin’s price, requesting the available crypto assets, or checking information about Ethereum. The material does not specify historical data, trading functions, alerts, portfolio tracking, or write operations.

Limitations and notes

The QuantGeekDev/coincap-mcp MCP server depends on CoinCap’s public API and therefore only exposes information available from that API. The README does not document an API-key setting, configurable endpoints, historical-price queries, rate-limit behavior, or response schemas.

Claude Desktop is the only MCP client explicitly shown in the setup instructions. Other clients may require their own configuration format, but compatibility with them is not established by the provided material. The project is released under the MIT License.