CoinCap JJ

You can access real-time cryptocurrency prices, market insights, and historical trends through a focused MCP server that leverages CoinCap data. This server gives you quick price checks, cross-exchange analysis, and time-based history to inform trading or research decisions.

How to use

Install an MCP client and connect to the CoinCap JJ MCP Server using the provided configuration. Once connected, you can call tools to retrieve current prices, market analysis, and historical price data. Use natural language prompts to trigger the tools, such as asking for a current price, market breakdown, or a specific historical window.

How to install

Prerequisites: Node.js installed on your system, and access to an MCP client compatible with your environment.

Step 1: Install the MCP client dependencies via your preferred package manager (npm is common). Then prepare your MCP client configuration to load the CoinCap JJ MCP Server.

{
  "mcpServers": {
    "coincap_jj": {
      "command": "npx",
      "args": [
        "-y",
        "@bujaayjaay/mcp-coincap-jj"
      ],
      "env": {
        "COINCAP_API_KEY": "INPUT_YOUR_API_KEY_HERE"
      }
    }
  }
}

Additional setup for Windows MCP clients

If you run the MCP server locally on Windows via an MCP client, you can use an explicit command path to ensure the correct npx invocation is used.

{
  "mcpServers": {
    "coincap_jj": {
      "command": "cmd.exe",
      "args": [
        "/c",
        "C:\\Program Files\\nodejs\\npx.cmd",
        "C:\\Users\\YOUR-WINDOWS-USERNAME\\repos\\github\\mcp-coincap-jj"
      ],
      "env": {
        "COINCAP_API_KEY": "YOUR_API_KEY_HERE"
      },
      "disabled": false,
      "alwaysAllow": []
    }
  }
}

Usage tips and prompts

The MCP server exposes tools you can call with natural language prompts. Examples: get-crypto-price for a coin’s current price, get-market-analysis for top exchanges by volume, and get-historical-analysis for price trends over a chosen window.

Tools

• get-crypto-price: Retrieves current price and 24h statistics for a chosen cryptocurrency, including price, 24h change, volume, market cap, and rank.

• get-market-analysis: Provides a detailed market view including top exchanges by volume, price variations across exchanges, volume distribution, and VWAP.

• get-historical-analysis: Analyzes historical price data with configurable time intervals (5 minutes to 1 day) and supports up to 30 days of data, returning price trends and volatility metrics.

Notes on API access

A CoinCap API key is required for the v3 API. Obtain your key from CoinCap and supply it in the environment variable COINCAP_API_KEY when you configure your MCP client.

Prompts you can try

• 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

Available tools

get-crypto-price

Fetches the current price and 24h statistics for a specified cryptocurrency, including price in USD, 24h change, volume, market cap, and rank.

get-market-analysis

Provides a detailed market view with top exchanges by volume, cross-exchange price variations, volume distribution, and VWAP.

get-historical-analysis

Analyzes historical price data with customizable intervals (5min to 1 day) and supports up to 30 days of data, returning trends and volatility metrics.