🚀 OneSearch MCP Server: Web Search & Crawl & Scraper & Extract

A Model Context Protocol (MCP) server implementation that integrates with multiple search providers for web search, local browser search, and scraping capabilities with agent-browser.

Features

• Web Search, scrape, crawl and extract content from websites.
• Support multiple search engines and web scrapers: SearXNG, Tavily, DuckDuckGo, Bing, Google, Zhipu (智谱), Exa, Bocha (博查), etc.
• Local web search (browser search), support multiple search engines: Bing, Google, Baidu, Sogou, etc.
  • Use agent-browser for browser automation.
  • Free, no API keys required.
• Enabled tools: one_search, one_scrape, one_map, one_extract

Migration from v1.1.0 and Earlier

Breaking Changes in v1.1.0:

• Firecrawl Removed: The Firecrawl integration has been removed in favor of agent-browser, which provides similar functionality without requiring external API services.
• New Browser Requirement: You must install Chromium browser (see Prerequisites section).
• Environment Variables: FIRECRAWL_API_URL and FIRECRAWL_API_KEY are no longer used.

What Changed:

• one_scrape and one_map now use agent-browser instead of Firecrawl
• one_extract tool is now fully implemented for structured data extraction from multiple URLs
• All browser-based operations are now handled locally, providing better privacy and no API costs

Migration Steps:

1. Install Chromium browser (see Prerequisites)
2. Remove FIRECRAWL_API_URL and FIRECRAWL_API_KEY from your environment variables
3. Update to the latest version: npm install -g one-search-mcp@latest

Prerequisites

Browser Requirement: This server uses agent-browser for web scraping and local search, which requires a Chromium-based browser.

Good News: The server will automatically detect and use browsers already installed on your system:

• ✅ Google Chrome
• ✅ Microsoft Edge
• ✅ Chromium
• ✅ Google Chrome Canary

If you don't have any of these browsers installed, you can:

# Option 1: Install Google Chrome (Recommended)
# Download from: https://www.google.com/chrome/

# Option 2: Install Microsoft Edge
# Download from: https://www.microsoft.com/edge

# Option 3: Install Chromium via agent-browser
npx agent-browser install

# Option 4: Install Chromium directly
# Download from: https://www.chromium.org/getting-involved/download-chromium/

Installation

Using Claude Code CLI (Recommended)

# Add to Claude Code with default settings (local search)
claude mcp add one-search-mcp -- npx -y one-search-mcp

# Add with custom search provider (e.g., SearXNG)
claude mcp add -e SEARCH_PROVIDER=searxng -e SEARCH_API_URL=http://127.0.0.1:8080 one-search-mcp -- npx -y one-search-mcp

# Add with Tavily API
claude mcp add -e SEARCH_PROVIDER=tavily -e SEARCH_API_KEY=your_api_key one-search-mcp -- npx -y one-search-mcp

Manual Installation

# Install globally (Optional)
npm install -g one-search-mcp

# Or run directly with npx
npx -y one-search-mcp

Environment Variables

Search Engine:

• SEARCH_PROVIDER (Optional): The search provider to use, supports searxng, duckduckgo, bing, tavily, google, zhipu, exa, bocha, local, default is local.
• SEARCH_API_URL (Optional): The URL of the SearxNG API, or Google Custom Search Engine ID for google.
• SEARCH_API_KEY (Optional): The API key for the search provider, required for tavily, bing, google, zhipu, exa, bocha.

// supported search providers
export type SearchProvider = 'searxng' | 'duckduckgo' | 'bing' | 'tavily' | 'google' | 'zhipu' | 'exa' | 'bocha' | 'local';

Search Provider Configuration

| Provider | API Key Required | API URL Required | Notes | |----------|-----------------|------------------|-------| | local | No | No | Free, uses browser automation | | duckduckgo | No | No | Free, no API key needed | | searxng | Optional | Yes | Self-hosted meta search engine | | bing | Yes | No | Bing Search API | | tavily | Yes | No | Tavily API | | google | Yes | Yes (Search Engine ID) | Google Custom Search | | zhipu | Yes | No | 智谱 AI | | exa | Yes | No | Exa AI | | bocha | Yes | No | 博查 AI |

Configuration for Other MCP Clients

Claude Desktop

Add to your Claude Desktop configuration file:

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

{
  "mcpServers": {
    "one-search-mcp": {
      "command": "npx",
      "args": ["-y", "one-search-mcp"],
      "env": {
        "SEARCH_PROVIDER": "local"
      }
    }
  }
}

Cursor

Add to your mcp.json file:

{
  "mcpServers": {
    "one-search-mcp": {
      "command": "npx",
      "args": ["-y", "one-search-mcp"],
      "env": {
        "SEARCH_PROVIDER": "local"
      }
    }
  }
}

Windsurf

Add to your ./codeium/windsurf/model_config.json file:

{
  "mcpServers": {
    "one-search-mcp": {
      "command": "npx",
      "args": ["-y", "one-search-mcp"],
      "env": {
        "SEARCH_PROVIDER": "local"
      }
    }
  }
}

Self-hosting SearXNG (Optional)

If you want to use SearXNG as your search provider, you can deploy it locally using Docker:

Prerequisites:

• Docker installed and running (version 20.10.0 or higher)
• At least 4GB of RAM available

Quick Start:

# Clone SearXNG Docker repository
git clone https://github.com/searxng/searxng-docker.git
cd searxng-docker

# Start SearXNG
docker compose up -d

After deployment, SearXNG will be available at http://127.0.0.1:8080 by default.

Configure OneSearch to use SearXNG:

# Set environment variables
export SEARCH_PROVIDER=searxng
export SEARCH_API_URL=http://127.0.0.1:8080

For more details, see the official SearXNG Docker documentation.

Troubleshooting

Browser not found error

If you see an error like "Browser not found", the server couldn't detect any installed Chromium-based browser. Please install one of the following:

• Google Chrome: https://www.google.com/chrome/
• Microsoft Edge: https://www.microsoft.com/edge
• Chromium: https://www.chromium.org/getting-involved/download-chromium/

Or install via agent-browser:

npx agent-browser install

License

MIT License - see LICENSE file for details.