duckduckgo-search MCP Server

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A Model Context Protocol server for DuckDuckGo Search

This is a TypeScript-based MCP server that provides DuckDuckGo search functionality. It demonstrates core MCP concepts through:

• Integration with DuckDuckGo Search

• Easy-to-use search tool interface

• Rate limiting and error handling support

Features

Search Tool

• duckduckgo_search - Perform web searches using DuckDuckGo API

  • Required parameter: query (search query, max 400 characters)

  • Optional parameter: count (number of results, 1-20, default 10)

  • Optional parameter: safeSearch (safety level: strict/moderate/off, default moderate)

  • Returns formatted Markdown search results

Rate Limits

• Maximum 1 request per second

• Maximum 15000 requests per month

Related MCP server: Google Search MCP Server

Development

Prerequisites

• Node.js >= 18

• pnpm >= 8.0.0

Installation

# Install pnpm if not already installed
npm install -g pnpm

# Install project dependencies
pnpm install

Build and Run

Build the server:

pnpm run build

For development with auto-rebuild:

pnpm run watch

Setup in Claude Desktop

To use with Claude Desktop, add the server config:

On MacOS: ~/Library/Application Support/Claude/claude_desktop_config.json On Windows: %APPDATA%/Claude/claude_desktop_config.json

# online
{
  "mcpServers": {
    "duckduckgo-search": {
        "command": "npx",
        "args": [
          "-y",
          "duckduckgo-mcp-server"
        ]
    }
  }
}

# local
{
  "mcpServers": {
    "duckduckgo-search": {
      "command": "node",
      "args": [
        "/path/to/duckduckgo-search/build/index.js"
      ]
    }
  }
}

Debugging

Since MCP servers communicate over stdio, debugging can be challenging. We recommend using the MCP Inspector, which is available as a package script:

pnpm run inspector

The Inspector will provide a URL to access debugging tools in your browser.