Crypto Price & Market Analysis MCP Server

A Model Context Protocol (MCP) server that provides comprehensive cryptocurrency analysis using the CoinCap API. This server offers real-time price data, market analysis, and historical trends through an easy-to-use interface. Supports both STDIO and Streamable HTTP transports.

Requirements

• Node.js 22.14+
• CoinCap API key via COINCAP_API_KEY

What's New

• BREAKING: CoinCap v2 API removed. Now uses v3 API exclusively. A COINCAP_API_KEY is required (free tier available at pro.coincap.io/dashboard)
• Streamable HTTP transport added (while keeping STDIO compatibility)
• Release workflow signs commits via SSH for Verified releases
• Smithery CLI scripts to build and run the HTTP server

Usage

Add this configuration to your Claude Desktop config file:

• MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp-crypto-price": {
      "command": "npx",
      "args": ["-y", "mcp-crypto-price"],
      "env": {
        "COINCAP_API_KEY": "YOUR_API_KEY_HERE"
      }
    }
  }
}

If your MCP client requires launching via cmd.exe on Windows:

{
  "mcpServers": {
    "mcp-crypto-price": {
      "command": "cmd",
      "args": ["/c", "npx", "-y", "mcp-crypto-price"],
      "env": {
        "COINCAP_API_KEY": "YOUR_API_KEY_HERE"
      }
    }
  }
}

Run as Streamable HTTP server

You can run the server over HTTP for environments that support MCP over HTTP streaming.

• Dev server (recommended during development):

npm run dev

• Build and run the HTTP server:

# Build (outputs to dist/)
npm run build

# Start the HTTP server
npm run start:http

• Build and run the STDIO server:

# Build (outputs to dist/)
npm run build

# Start the STDIO server
npm run start:stdio

The server listens on port 3000 by default (override with PORT). For clients that connect over HTTP (e.g. Smithery, Claude.ai), pass your API key as a query parameter:

http://localhost:3000/mcp?COINCAP_API_KEY=YOUR_API_KEY_HERE

For remote deployments:

https://mcp-crypto-price.codemonkeyinnovations.com/mcp?COINCAP_API_KEY=YOUR_API_KEY_HERE

Required: CoinCap API Key

This server uses the CoinCap v3 API, which requires an API key. A free tier is available.

1. Sign up and get your API key at pro.coincap.io/dashboard
2. Add the key to your MCP client configuration:
   • STDIO: via the COINCAP_API_KEY environment variable (see Usage examples above)
   • HTTP: via the COINCAP_API_KEY query parameter in the connection URL (e.g. /mcp?COINCAP_API_KEY=your_key)

Without a valid API key, all tools will return an error with instructions on how to obtain one.

Note for Smithery CLI users

This MCP server works directly via npx (configs above) and does not require Smithery.

If you do use the Smithery CLI, authenticate with smithery auth login or by setting SMITHERY_API_KEY in your environment. Recent versions of the Smithery CLI do not support passing API keys via --key (or older --profile patterns).

Launch Claude Desktop to start using the crypto analysis tools.

Verified commits & SSH signing

This repository requires Verified (cryptographically signed) commits. CI also includes a job (Verify commit signatures) that fails PRs with unsigned commits.

Create an SSH signing key (once)

# Generate a new ed25519 SSH key (no p

... [View full README on GitHub](https://github.com/truss44/mcp-crypto-price#readme)