Crypto Price

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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)
• 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"
      }
    }
  }
}

Development scripts

pnpm dev          # Development (HTTP server with hot reload via Smithery CLI)
pnpm build         # Compile TypeScript → dist/
pnpm format        # Format source files with Prettier
pnpm lint          # Check for lint errors (ESLint + typescript-eslint)
pnpm lint:fix      # Auto-fix lint errors
pnpm types:check   # TypeScript type-check without emitting files
pnpm test          # Run all tests
pnpm test:coverage # Run tests with coverage report
pnpm inspector     # Open MCP inspector for interactive debugging

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):

pnpm dev

• Build and run the HTTP server:

# Build (outputs to dist/)
pnpm build

# Start the HTTP server
pnpm start:http

• Build and run the STDIO server:

# Build (outputs to dist/)
pnpm build

# Start the STDIO server
pnpm 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 pnpm dlx (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.

Tools

get-crypto-price

Gets current price and 24h stats for any cryptocurrency, including:

• Current price in USD
• 24-hour price change
• Trading volume
• Market cap
• Market rank

get-market-analysis

Provides detailed market analysis including:

• Top 5 exchanges by volume
• Price variations across exchanges
• Volume distribution analysis
• VWAP (Volume Weighted Average Price)

get-historical-analysis

Analyzes historical price data with:

• Customizable time intervals (5min to 1 day)
• Support for up to 30 days of historical data
• Price trend analysis
• Volatility metrics
• High/low price ranges

get-top-assets

Lists top cryptocurrencies ranked by market cap, including:

• Current price in USD
• 24-hour price change
• Market cap and rank
• Configurable result count (1–50, default 10)

get-technical-analysis

Returns the latest technical indicators for any cryptocurrency:

• SMA (Simple Moving Average) with period
• EMA (Exponential Moving Average) with period
• RSI (Relative Strength Index) with Overbought/Oversold/Neutral signal
• MACD with signal line, histogram, and Bullish/Bearish label
• VWAP (Volume Weighted Average Price, 24h)

get-rates

Returns USD-based conversion rates for fiat currencies and cryptocurrencies:

• All fiat currency rates (USD base)
• Top 10 cryptocurrency rates
• Optional slug parameter (e.g. euro, bitcoin) for a single rate lookup

get-exchanges

Lists top cryptocurrency exchanges ranked by 24h volume:

• Exchange name, rank, and 24h volume in USD
• Number of trading pairs and market share percentage
• Optional exchangeId parameter (e.g. binance) for single exchange details
• Optional limit parameter (1–50, default 10)

Sample Prompts

• "What's the current price of Bitcoin?"
• "Show me market analysis for ETH"
• "Give me the 7-day price history for DOGE"
• "What are the top exchanges trading BTC?"
• "Show me the price trends for SOL with 1-hour intervals"
• "What are the technical indicators for ETH right now?"
• "What's the current EUR to USD exchange rate?"
• "Which crypto exchanges have the highest 24h volume?"

Project Inspiration

This project was inspired by Alex Andru's coincap-mcp project.

License

This project is licensed under the MIT License