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browser-use/skills/cloud/references/browser-api.md

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# Browser API (Direct CDP Access)
Connect directly to Browser Use stealth browsers via Chrome DevTools Protocol.
## Table of Contents
- [WebSocket Connection](#websocket-connection)
- [SDK Approach](#sdk-approach)
- [Playwright Integration](#playwright-integration)
- [Puppeteer Integration](#puppeteer-integration)
- [Selenium Integration](#selenium-integration)
---
## WebSocket Connection
Single URL with all config as query params. Browser **auto-starts on connect** and **auto-stops on disconnect** — no REST calls needed to start or stop.
```
wss://connect.browser-use.com?apiKey=YOUR_KEY&proxyCountryCode=us&timeout=30
```
CDP discovery is also available over HTTPS (for tools that use HTTP auto-discovery):
```
https://connect.browser-use.com/json/version?apiKey=YOUR_API_KEY
```
### Query Parameters
| Param | Required | Description |
|-------|----------|-------------|
| `apiKey` | **yes** | API key |
| `proxyCountryCode` | no | Residential proxy country (195+ countries) |
| `profileId` | no | Browser profile UUID |
| `timeout` | no | Session timeout in minutes (max 240) |
| `browserScreenWidth` | no | Browser width in pixels |
| `browserScreenHeight` | no | Browser height in pixels |
| `customProxy.host` | no | Custom proxy host |
| `customProxy.port` | no | Custom proxy port |
| `customProxy.username` | no | Custom proxy username |
| `customProxy.password` | no | Custom proxy password |
## SDK Approach
```python
# Create browser
browser = await client.browsers.create(
profile_id="uuid",
proxy_country_code="us",
timeout=60,
)
print(browser.cdp_url) # wss://... for CDP connection
print(browser.live_url) # View in browser
# Stop (unused time refunded)
await client.browsers.stop(browser.id)
```
## Playwright Integration
```python
from playwright.async_api import async_playwright
# Create cloud browser
browser_session = await client.browsers.create(proxy_country_code="us")
# Connect Playwright
pw = await async_playwright().start()
browser = await pw.chromium.connect_over_cdp(browser_session.cdp_url)
page = browser.contexts[0].pages[0]
# Normal Playwright code
await page.goto("https://example.com")
await page.fill("#email", "user@example.com")
await page.click("button[type=submit]")
content = await page.content()
# Cleanup
await pw.stop()
await client.browsers.stop(browser_session.id)
```
## Puppeteer Integration
```javascript
const puppeteer = require('puppeteer-core');
const browser = await client.browsers.create({ proxyCountryCode: 'us' });
const puppeteerBrowser = await puppeteer.connect({ browserWSEndpoint: browser.cdpUrl });
const page = (await puppeteerBrowser.pages())[0];
await page.goto('https://example.com');
// ... normal Puppeteer code
await puppeteerBrowser.close();
await client.browsers.stop(browser.id);
```
## Selenium Integration
```python
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
browser_session = await client.browsers.create(proxy_country_code="us")
options = Options()
options.debugger_address = browser_session.cdp_url.replace("wss://", "").replace("ws://", "").replace("/devtools/browser/", "")
driver = webdriver.Chrome(options=options)
driver.get("https://example.com")
# ... normal Selenium code
driver.quit()
await client.browsers.stop(browser_session.id)
```
### Session Limits
- Free: 15 minutes max
- Paid: 4 hours max
- Pricing: $0.05/hour, billed upfront, proportional refund on early stop, min 1 minute