Nansen MCP

Name: Nansen MCP
Author: Nansen

On-chain blockchain analytics and wallet intelligence

Official

Blockchain & Web3

Install Command

npx -y @nansen/mcp-server

Claude Desktop Config

{
  "mcpServers": {
    "nansen": {
      "command": "npx",
      "args": ["-y", "@nansen/mcp-server"],
      "env": { "NANSEN_API_KEY": "<KEY>" }
    }
  }
}

Nansen MCP is an officially maintained MCP server in the Blockchain & Web3 category, developed by Nansen. It runs locally on your machine, keeping your data private and giving you full control over the connection. Adding it to your setup expands what Claude can do without any extra coding.

About Nansen MCP

Official Nansen MCP server provides AI assistants with institutional-grade on-chain analytics.

Features

Smart Money wallet tracking and signals
Token flow and movement analysis
Wallet profiling and labelling
NFT market analytics
DeFi protocol data
Cross-chain analytics across Ethereum, Solana, and more

Who Should Use Nansen MCP?

1Control a browser and scrape the web through Claude
2Extend Claude and other AI assistants with new capabilities
3Automate tasks that previously required manual steps
4Connect your existing tools to an AI workflow

How to Install Nansen MCP

Before you start

You will need Node.js (v18 or later) installed on your machine — download it from nodejs.org if you haven't already.

1Open a terminal (Terminal on Mac, Command Prompt or PowerShell on Windows).
2Paste the install command above and press Enter — Node.js will download and run the server automatically.
3Add the server to your Claude Desktop config file (see the JSON snippet above) and restart Claude.

The Claude Desktop config snippet above can be copied and pasted directly into your claude_desktop_config.json file — no editing required.

How Nansen MCP Compares

✦It is an officially maintained server — unlike community alternatives, it is built and supported by the original project team, ensuring compatibility with upstream changes.

✦It runs entirely on your local machine, so no data leaves your environment — important for teams with privacy or compliance requirements.

✦Authentication uses API keys, giving you fine-grained control over access without requiring a full OAuth setup.