Bitcoin MCP Server

A Model Context Protocol (MCP) server that provides real-time Bitcoin blockchain data by querying the mempool.space API.

Features

This MCP server offers five specialized tools for querying Bitcoin blockchain data:

🔍 Address Tools

get-address-stats

Get basic statistics for any Bitcoin address.

Input:

• address (string): Bitcoin address to query

Output:

• Chain statistics (funded/spent amounts, transaction counts)
• Mempool statistics (pending transactions)

Example:

Address: 1wiz18xYmhRX6xStj2b9t1rwWX4GKUgpv

Chain Stats:
- Funded TXOs: 10
- Funded Sum: 150.07686949 BTC
- Spent TXOs: 5
- Spent Sum: 150.07599040 BTC
- Total Transactions: 12

Mempool Stats:
- Pending TXOs: 0
- Pending Sum: 0.00000000 BTC
- Pending Transactions: 0

get-address-transactions

Get transaction history for a Bitcoin address.

Input:

• address (string): Bitcoin address to query
• limit (optional, number): Number of transactions to return (1-50, default: 10)

Output:

• List of recent transactions with status, dates, fees, and sizes

get-address-utxos

Get current UTXOs (unspent transaction outputs) for a Bitcoin address.

Input:

• address (string): Bitcoin address to query
• limit (optional, number): Number of UTXOs to return (1-50, default: 10)

Output:

• List of current UTXOs with amounts, confirmation status, and dates

🔗 Transaction Tools

get-transaction

Get detailed information about a specific Bitcoin transaction.

Input:

• txid (string): Transaction ID (hash) to query

Output:

• Complete transaction details including:
  • Basic info (version, size, weight, fee)
  • Confirmation status and block information
  • Input and output details with amounts and addresses

🧱 Block Tools

get-block

Get information about a specific Bitcoin block.

Input:

• block_height (number): Block height to query

Output:

• Block details including:
  • Hash, version, merkle root
  • Previous block hash and timestamp
  • Size, weight, and transaction count
  • Fee statistics

Installation

1. Clone this repository:

git clone <repository-url>
cd bitcoin-mcp

2. Install dependencies:

npm install

3. Build the project:

npm run build

Usage

Running the Server

Start the MCP server:

npm start

The server runs on stdio and can be connected to any MCP-compatible client.

Example Queries

Here are some example queries you can make with this MCP server:

Get Address Statistics

{
  "tool": "get-address-stats",
  "arguments": {
    "address": "1wiz18xYmhRX6xStj2b9t1rwWX4GKUgpv"
  }
}

Get Recent Transactions

{
  "tool": "get-address-transactions",
  "arguments": {
    "address": "1wiz18xYmhRX6xStj2b9t1rwWX4GKUgpv",
    "limit": 5
  }
}

Get Transaction Details

{
  "tool": "get-transaction",
  "arguments": {
    "txid": "15e10745f15593a899cef391191bdd3d7c12412cc4696b7bcb669d0feadc8521"
  }
}

Get Block Information

{
  "tool": "get-block",
  "arguments": {
    "block_height": 857808
  }
}

API Endpoints

This MCP server uses the following mempool.space API endpoints:

• GET /api/address/{address} - Address statistics
• GET /api/address/{address}/txs - Address transaction history
• GET /api/address/{address}/utxo - Address UTXOs
• GET /api/tx/{txid} - Transaction details
• GET /api/block/{height} - Block information

Data Format

All amounts are displayed in BTC (converted from satoshis) for better readability. Timestamps are converted to ISO format for easy parsing.

Error Handling

The server includes comprehensive error handling:

• Network errors are caught and reported with descriptive messages
• Invalid addresses or transaction IDs return appropriate error messages
• Rate limiting and API errors are handled gracefully

Dependencies

• @modelcontextprotocol/sdk - MCP SDK for server implementation
• superagent - HTTP client for API requests
• zod - Schema validation for tool parameters

License

This project is licensed under the MIT License - see the LICENSE.md file for details.