Connecting to Nansen MCP

The Nansen MCP server provides AI assistants with access to comprehensive blockchain analytics through a secure API. This guide covers how to connect to Nansen MCP.

Prerequisites

Before connecting, you'll need:

1. Nansen API Key: Get yours at https://app.nansen.ai/api?tab=api

2. npx: Required for remote connections (npm install -g npx)

Installation Guide

1. Claude Desktop (One-Click Install; Claude Desktop Required)

The easiest way to get started with Nansen MCP. Double-click the downloaded .dxt file to configure automatically.

Quick Install Link

2. Claude Code (Terminal Integration)

Connect Nansen MCP through your terminal:

claude mcp add --transport http nansen https://mcp.nansen.ai/ra/mcp --header "NANSEN-API-KEY: YOUR_API_KEY_HERE"

3. Cursor IDE

One-click install via Cursor deep link:

1. Copy the deep link below (right-click > copy)

2. Paste into any Cursor text/chat field

3. Ctrl+Click (or Cmd+Click on Mac) inside Cursor to install

cursor://anysphere.cursor-deeplink/mcp/install?name=nansen-mcp&config=eyJlbnYiOnsiTkFOU0VOX0FQSV9LRVkiOiJSRVBMQUNFX1RISVMifSwiY29tbWFuZCI6Im5weCIsImFyZ3MiOlsiLXkiLCJtY3AtcmVtb3RlIiwiaHR0cHM6Ly9tY3AubmFuc2VuLmFpL3JhL21jcC8iLCItLWhlYWRlciIsIk5BTlNFTi1BUEktS0VZOiR7TkFOU0VOX0FQSV9LRVl9IiwiLS1hbGxvdy1odHRwIl19Cg==

4. Other MCP Clients

Integration example for various other tools supporting MCPs

Server configuration:

• Server: https://mcp.nansen.ai/ra/mcp

• Header: NANSEN-API-KEY: your_api_key

• Transport: mcp-remote --allow-http

{
  "mcpServers": {
    "nansen-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://mcp.nansen.ai/ra/mcp",
        "--header",
        "NANSEN-API-KEY: ",
        "--allow-http"
      ]
    }
  }
}

NPX example:

npx -y mcp-remote https://mcp.nansen.ai/ra/mcp \\
  --header "NANSEN-API-KEY:YOUR_API_KEY_HERE" \\
  --allow-http

Authentication

⚠️ Nansen MCP uses the same API as your regular API keys. Ensure you have sufficient credits for your usage.