Crawl-MCP: Unofficial MCP Server for crawl4ai

⚠️ Important: This is an unofficial MCP server implementation for the excellent crawl4ai library.
Not affiliated with the original crawl4ai project.

A comprehensive Model Context Protocol (MCP) server that wraps the powerful crawl4ai library with advanced AI capabilities. Extract and analyze content from any source: web pages, PDFs, Office documents, YouTube videos, and more. Features intelligent summarization to dramatically reduce token usage while preserving key information.

🌟 Key Features

• 🔍 Google Search Integration - 7 optimized search genres with Google official operators

• 🔍 Advanced Web Crawling: JavaScript support, deep site mapping, entity extraction

• 🌐 Universal Content Extraction: Web pages, PDFs, Word docs, Excel, PowerPoint, ZIP archives

• 🤖 AI-Powered Summarization: Smart token reduction (up to 88.5%) while preserving essential information

• 🎬 YouTube Integration: Extract video transcripts and summaries without API keys

• ⚡ Production Ready: 19 specialized tools with comprehensive error handling

🚀 Quick Start

Prerequisites (Required First)

• Python 3.11 以上（FastMCP が Python 3.11+ を要求）

Install system dependencies for Playwright:

Ubuntu 24.04 LTS (Manual Required):

# Manual setup required due to t64 library transition
sudo apt update && sudo apt install -y \
  libnss3 libatk-bridge2.0-0 libxss1 libasound2t64 \
  libgbm1 libgtk-3-0t64 libxshmfence-dev libxrandr2 \
  libxcomposite1 libxcursor1 libxdamage1 libxi6 \
  fonts-noto-color-emoji fonts-unifont python3-venv python3-pip

python3 -m venv venv && source venv/bin/activate
pip install playwright==1.55.0 && playwright install chromium
sudo playwright install-deps

Other Linux/macOS:

sudo bash scripts/prepare_for_uvx_playwright.sh

Windows (as Administrator):

scripts/prepare_for_uvx_playwright.ps1

Installation

UVX (Recommended - Easiest):

# After system preparation above - that's it!
uvx --from git+https://github.com/walksoda/crawl-mcp crawl-mcp

Docker (Production-Ready):

# Clone the repository
git clone https://github.com/walksoda/crawl-mcp
cd crawl-mcp

# Build and run with Docker Compose (STDIO mode)
docker-compose up --build

# Or build and run HTTP mode on port 8000
docker-compose --profile http up --build crawl4ai-mcp-http

# Or build manually
docker build -t crawl4ai-mcp .
docker run -it crawl4ai-mcp

Docker Features:

• 🔧 Multi-Browser Support: Chromium, Firefox, Webkit headless browsers

• 🐧 Google Chrome: Additional Chrome Stable for compatibility

• ⚡ Optimized Performance: Pre-configured browser flags for Docker

• 🔒 Security: Non-root user execution

• 📦 Complete Dependencies: All required libraries included

Claude Desktop Setup

UVX Installation: Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "crawl-mcp": {
      "transport": "stdio",
      "command": "uvx",
      "args": [
        "--from",
        "git+https://github.com/walksoda/crawl-mcp",
        "crawl-mcp"
      ],
      "env": {
        "CRAWL4AI_LANG": "en"
      }
    }
  }
}

Docker HTTP Mode:

{
  "mcpServers": {
    "crawl-mcp": {
      "transport": "http",
      "baseUrl": "http://localhost:8000"
    }
  }
}

For Japanese interface:

"env": {
  "CRAWL4AI_LANG": "ja"
}

📖 Documentation

Language-Specific Documentation

• English: docs/ directory

• 日本語: docs/ja/ directory

🛠️ Tool Overview

Web Crawling (3)

• crawl_url - Extract web page content with JavaScript support

• deep_crawl_site - Crawl multiple pages from a site with configurable depth

• crawl_url_with_fallback - Crawl with fallback strategies for anti-bot sites

Data Extraction (3)

• intelligent_extract - Extract specific data from web pages using LLM

• extract_entities - Extract entities (emails, phones, etc.) from web pages

• extract_structured_data - Extract structured data using CSS selectors or LLM

YouTube (4)

• extract_youtube_transcript - Extract YouTube transcripts with timestamps

• batch_extract_youtube_transcripts - Extract transcripts from multiple YouTube videos (max 3)

• get_youtube_video_info - Get YouTube video metadata and transcript availability

• extract_youtube_comments - Extract YouTube video comments with pagination

Search (4)

• search_google - Search Google with genre filtering

• batch_search_google - Perform multiple Google searches (max 3)

• search_and_crawl - Search Google and crawl top results

• get_search_genres - Get available search genres

File Processing (3)

• process_file - Convert PDF, Word, Excel, PowerPoint, ZIP to markdown

• get_supported_file_formats - Get supported file formats and capabilities

• enhanced_process_large_content - Process large content with chunking and BM25 filtering

Batch Operations (2)

• batch_crawl - Crawl multiple URLs with fallback (max 3 URLs)

• multi_url_crawl - Multi-URL crawl with pattern-based config (max 5 URL patterns)

🎯 Common Use Cases

Content Research:

search_and_crawl → extract_structured_data → analysis

Documentation Mining:

deep_crawl_site → batch processing → extraction

Media Analysis:

extract_youtube_transcript → summarization workflow

Site Mapping:

batch_crawl → multi_url_crawl → comprehensive data

🚨 Quick Troubleshooting

Installation Issues:

1. Re-run setup scripts with proper privileges

2. Try development installation method

3. Check browser dependencies are installed

Performance Issues:

• Use wait_for_js: true for JavaScript-heavy sites

• Increase timeout for slow-loading pages

• Use extract_structured_data for targeted extraction

Configuration Issues:

• Check JSON syntax in claude_desktop_config.json

• Verify file paths are absolute

• Restart Claude Desktop after configuration changes

🏗️ Project Structure

• Original Library: crawl4ai by unclecode

• MCP Wrapper: This repository (walksoda)

• Implementation: Unofficial third-party integration

📄 License

This project is an unofficial wrapper around the crawl4ai library. Please refer to the original crawl4ai license for the underlying functionality.

🤝 Contributing

See our Development Guide for contribution guidelines and development setup instructions.

🔗 Related Projects

• crawl4ai - The underlying web crawling library

• Model Context Protocol - The standard this server implements

• Claude Desktop - Primary client for MCP servers