---
title: Anthropic Claude | Lightcone
description: Use Claude's computer-use capabilities with Lightcone browser sessions.
---

Use [Anthropic Claude’s computer use](https://docs.anthropic.com/en/docs/build-with-claude/computer-use) with Lightcone cloud browsers. Claude sees screenshots of the browser and decides what to click, type, and scroll. Lightcone provides the sandboxed execution environment.

## Setup

Terminal window

```
pip install tzafon playwright anthropic
playwright install chromium
```

## Example

```
import anthropic
from tzafon import Lightcone
from playwright.sync_api import sync_playwright
import base64


# Create a Lightcone browser session
lc = Lightcone()
session = lc.computers.create(kind="browser")
cdp_url = session.endpoints.get("cdp")


# Connect Playwright
with sync_playwright() as p:
    browser = p.chromium.connect_over_cdp(cdp_url)
    page = browser.contexts[0].pages[0]


    page.goto("https://example.com")
    screenshot = page.screenshot()
    b64_screenshot = base64.b64encode(screenshot).decode()


    # Ask Claude to analyze the page
    client = anthropic.Anthropic()
    response = client.messages.create(
        model="claude-sonnet-4-20250514",
        max_tokens=1024,
        tools=[{
            "type": "computer_20250124",
            "name": "computer",
            "display_width_px": 1280,
            "display_height_px": 720,
            "display_number": 1,
        }],
        messages=[{
            "role": "user",
            "content": [
                {"type": "text", "text": "Click on the 'More information' link"},
                {
                    "type": "image",
                    "source": {
                        "type": "base64",
                        "media_type": "image/png",
                        "data": b64_screenshot,
                    },
                },
            ],
        }],
    )


    # Process Claude's tool use response
    for block in response.content:
        if block.type == "tool_use":
            action = block.input
            if action.get("action") == "mouse_move" or action.get("action") == "left_click":
                x, y = action["coordinate"]
                page.mouse.click(x, y)


    browser.close()


lc.computers.delete(session.id)
```

## Why use Lightcone with Claude?

- **Cloud execution** — No need to run browsers locally; Lightcone handles the infrastructure
- **Stealth mode** — Access sites that block automation
- **Session persistence** — Save login sessions for reuse
- **Scale** — Run many agents in parallel on separate browser instances

For a fully managed experience without Playwright, use Lightcone’s native [Responses API](/guides/responses-api/index.md) with the `tzafon.northstar-cua-fast` model. It handles the screenshot-action loop for you.

## Resources

- [Anthropic computer use docs](https://docs.anthropic.com/en/docs/build-with-claude/computer-use)
- [Lightcone Playwright integration](/integrations/playwright/index.md)

## See also

- [**OpenAI CUA**](/integrations/openai-cua/index.md) — OpenAI’s computer-use agent with Lightcone
- [**CUA protocol guide**](/guides/cua-protocol/index.md) — build a CUA loop with Lightcone’s native API
- [**Playwright**](/integrations/playwright/index.md) — CDP connection details