duckduckgo-mcp-server

duckduckgo-mcp-serverは、DuckDuckGoの検索機能を提供するTypeScriptベースのMCPサーバーです。このツールは、MCPのコア概念を実演し、簡単に使用できる検索ツールインターフェースを提供します。また、リクエストのレート制限やエラーハンドリングのサポートも備えています。これにより、開発者はDuckDuckGoの検索機能を簡単に統合し、利用することができます。

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README
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
DuckDuckGo Server MCP server
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
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"
      ]
    }
  }
}

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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.

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