> ## Documentation Index
> Fetch the complete documentation index at: https://docs.driver.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Crawl4AI

> Point Crawl4AI's managed browser at a Driver session to crawl from real Chrome on an ISP network.

[Crawl4AI](https://crawl4ai.com) turns pages into LLM-ready Markdown. Configure it to attach to a Driver session instead of launching its own browser.

```bash theme={"dark"}
pip install crawl4ai requests
```

```python Python theme={"dark"}
import asyncio, os, requests
from crawl4ai import AsyncWebCrawler, BrowserConfig

API = "https://api.driver.dev"
headers = {"Authorization": f"Bearer {os.environ['DRIVER_API_KEY']}"}


async def main():
    r = requests.post(f"{API}/v1/browser/session", headers=headers, json={"country": "US"})
    r.raise_for_status()
    session = r.json()
    try:
        config = BrowserConfig(browser_mode="custom", cdp_url=session["cdpUrl"], use_managed_browser=True)
        async with AsyncWebCrawler(config=config) as crawler:
            result = await crawler.arun(url="https://www.nbcnews.com/business")
            print(result.markdown)
    finally:
        requests.delete(
            f"{API}/v1/browser/session", headers=headers, params={"sessionId": session["sessionId"]}
        )


asyncio.run(main())
```

## Notes

* `browser_mode="custom"` with `cdp_url` attaches Crawl4AI to the browser you give it. `use_managed_browser=True` makes it drive that browser over CDP instead of through a Playwright launch. Leaving the `async with` block closes Crawl4AI's connection only; the session runs until you stop it.
* Crawl4AI is Playwright underneath and injects its own scripts, so it carries the stock-Playwright fingerprint. Use it on sites that don't challenge automation.
* Pin the `crawl4ai` version you tested with. Its post-install step downloads a browser you won't use. Harmless.
* Crawl several URLs in one session. Creating the session is the expensive step.