Arbitrum MCP server

This MCP server provides real-time Arbitrum blockchain data analysis capabilities using the Arbiscan API and Claude AI. It allows users to query blockchain information, analyze transactions, check account balances, and obtain network statistics with AI-powered interpretation.

Features

• Real-time Arbitrum blockchain data fetching
• Latest block information
• Transaction analysis
• Account balance checking
• Network statistics
• AI-powered data interpretation using Claude

Installation

1. Install dependencies:

npm install

2. Create a .env file with your API keys:

ARBISCAN_API_KEY=your_arbiscan_api_key
CLAUDE_API_KEY=your_claude_api_key

3. Run the server:

npx tsx arbitrum-mcp.ts

Usage Guide

The server provides a tool called "getArbitrumData" that accepts two parameters:

• fullPrompt: Your query about Arbitrum data
• address (optional): Specific Ethereum address to analyze

Example Queries

You can use the following query examples with the server:

• "What is the latest block?"
• "Show me recent transactions"
• "What's the current ETH supply on Arbitrum?"
• "Check balance for address 0x..."

Running Queries

After starting the server, you can interact with it to retrieve Arbitrum blockchain data based on your queries. The AI-powered interpretation will provide context and explanations for the blockchain data returned.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "arbitrum" '{"command":"npx","args":["tsx","arbitrum-mcp.ts"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "arbitrum": {
            "command": "npx",
            "args": [
                "tsx",
                "arbitrum-mcp.ts"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "arbitrum": {
            "command": "npx",
            "args": [
                "tsx",
                "arbitrum-mcp.ts"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect