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Anthropic Claude

Anthropic Claude

Use Claude's computer-use capabilities with Lightcone browser sessions.

Use Anthropic Claude’s 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

Section titled “Setup”
Terminal window
pip install tzafon playwright anthropic
playwright install chromium

Example

Section titled “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?

Section titled “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

Resources

Section titled “Resources”

See also

Section titled “See also”