> ## Documentation Index
> Fetch the complete documentation index at: https://browseruse-0aece648-mintlify-cli-docs-1773354647.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# All Parameters

> Sandbox configuration reference

## Reference

| Parameter                  | Type       | Description                            | Default  |
| -------------------------- | ---------- | -------------------------------------- | -------- |
| `BROWSER_USE_API_KEY`      | `str`      | API key (or env var)                   | Required |
| `cloud_profile_id`         | `str`      | Browser profile UUID                   | `None`   |
| `cloud_proxy_country_code` | `str`      | us, uk, fr, it, jp, au, de, fi, ca, in | `None`   |
| `cloud_timeout`            | `int`      | Minutes (max: 15 free, 240 paid)       | `None`   |
| `on_browser_created`       | `Callable` | Live URL callback                      | `None`   |
| `on_log`                   | `Callable` | Log event callback                     | `None`   |
| `on_result`                | `Callable` | Success callback                       | `None`   |
| `on_error`                 | `Callable` | Error callback                         | `None`   |

## Example

```python theme={null}
@sandbox(
    cloud_profile_id='550e8400-e29b-41d4-a716-446655440000',
    cloud_proxy_country_code='us',
    cloud_timeout=60,
    on_browser_created=lambda data: print(f'Live: {data.live_url}'),
)
async def task(browser: Browser):
    agent = Agent(task="your task", browser=browser, llm=ChatBrowserUse())
    await agent.run()
```