crawl4ai — security grade SAFE, quality 54/100

Security audit verdict: SAFE · quality 54/100

No red flags found in any of the 11 categories — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

by unclecode · MCP Server · ★ 84.2k

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

🔒 Is crawl4ai safe to install? View the security audit →

About crawl4ai

🚀🤖 Crawl4AI: the open-source web crawler for LLMs and AI agents Latest: v0.9.4 (23 Sep 2026) · all releases → <img alt="Crawl4AI Cloud is live. Soft launch: your first $10 is on us until 31 December 2026, no card. Get your key." src="https://raw.githubusercontent.com/unclecode/crawl4ai/

aiai-agentscrawlerdata-extractionllmmarkdownmcpopen-sourceplaywrightpython

Quick Facts

Stars84,244
Forks8,713
LanguagePython
CategoryMCP Server
LicenseApache-2.0
Quality Score54.0431458849492/100
Open Issues197
Last Updated2026-09-25
Created2024-05-09
Platformsbrowser, mcp, python
Est. Tokens~13k

Compatible Skills

These tools work well together with crawl4ai for enhanced workflows:

  • scrapai-cli — semantic(0.36)+complementary+rare_topics+same_lang+shared_platform (62%)
  • Scrapling — semantic(0.45)+rare_topics+same_lang+similar_pop+shared_platform (60%)

crawl4ai alternative? Top 6 similar tools

Looking for a crawl4ai alternative? If you're comparing crawl4ai with other mcp server tools, these 6 projects are the closest alternatives on Agent Skills Hub — ranked by topic overlap, star count, and community traction.

  • Scrapling by D4Vinci · ⭐ 85.4k

    🕷️ An adaptive Web Scraping framework that handles everything from a single request to a full-scale crawl! Do

  • stagehand by browserbase · ⭐ 25.5k

    The SDK to extract data and interact with any site on the web. Get started with Claude Code, Codex, Eve, Mastr

  • headroom by chopratejas · ⭐ 44.4k

    Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 60-95% fewer tokens, same answer

  • open-webui by open-webui · ⭐ 153.8k

    User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

  • browser-use by browser-use · ⭐ 117.0k

    Agents that use the browser.

  • ragflow by infiniflow · ⭐ 90.9k

    RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that fuses cutting-edge RAG with

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Frequently Asked Questions

What is crawl4ai?

crawl4ai is Open-source web crawler and scraper for LLMs and AI agents: any website into clean, LLM-ready Markdown. Run it yourself, or use Crawl4AI Cloud with one key.. It is categorized as a MCP Server with 84.2k GitHub stars.

What programming language is crawl4ai written in?

crawl4ai is primarily written in Python. It covers topics such as ai, ai-agents, crawler.

How do I install or use crawl4ai?

You can find installation instructions and usage details in the crawl4ai GitHub repository at github.com/unclecode/crawl4ai. The project has 84.2k stars and 8713 forks, indicating an active community.

What license does crawl4ai use?

crawl4ai is released under the Apache-2.0 license, making it free to use and modify according to the license terms.

What are the best alternatives to crawl4ai?

The top alternatives to crawl4ai on Agent Skills Hub include Scrapling, stagehand, headroom. Each offers a different approach to the same problem space — compare them side-by-side by stars, quality score, and community activity.

How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy, covering 11 red-flag categories including credential harvesting, data exfiltration, and curl | sh installers. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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