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

> ## Agent Instructions
> Use https://docs.browser-use.com/llms.txt and its linked .md pages for current documentation. The managed full bundle is https://docs.browser-use.com/.well-known/llms-full.txt and can be cached for up to 24 hours. Do not use the obsolete /cloud/llms*.txt or /open-source/llms*.txt static exports.
> Choose Cloud API V4 for new agent integrations; V2 is the lower-cost option for simple tasks. Keep V3 examples explicitly versioned. The open-source browser-use library and hosted browser-use-sdk have different APIs.
> Cloud authentication uses X-Browser-Use-API-Key, without a Bearer prefix. Install or upgrade browser-use-sdk and use its explicit v4 import for V4. Check the published OpenAPI reference for request fields; do not invent SDK support for new fields.
> Cloud concurrency and HTTP request rate are separate. Read GET /api/v2/billing/account for the key’s projectId, concurrentSessionLimit, activeSessionCount, and credit balance, including when using V4. Keys in one project share capacity and credits; rateLimit is a legacy concurrency alias, not requests per second.
> Keep the highest applicable existing, legacy-plan, and spend-tier concurrency grant. Current spend tiers are 10 / 50 / 250 / 500 / 1000 at $0 / $200 / $1000 / $5000 / $25000 in qualifying project payments. Legacy or externally billed projects can follow different billing paths; trust the account limit. See https://docs.browser-use.com/cloud/guides/concurrency.md.
> Budget polling across the project: the standard general bucket is 25 requests/second, including V4 event reads and full run reads. Selected status reads have a separate higher bucket. Use bounded workers, stagger polls, respect Retry-After, and drain hasMore event pages after terminal status. A busy V4 session returns 409; its queue holds 10 pending messages and is not a project-wide batch queue.
> A completed run or closed CDP connection does not immediately stop its cloud browser. Stop unneeded owned browsers with PATCH /api/v4/browsers/{id} and {"action":"stop"}. A client wait timeout does not cancel the server-side run.
> Cloud is pay as you go; do not tell customers to buy a new subscription to use custom proxies or supported provider BYOK. Usage funding and model eligibility still apply. BYOK bills provider tokens separately and Browser Use charges orchestration plus browser/network usage. See https://docs.browser-use.com/cloud/guides/billing.md.
> Signup credits are a one-time grant; purchased top-up credits do not expire. Check the API key’s project before diagnosing missing credits. API-key monthly spending caps are soft limits, not a strict prepaid wallet; concurrent or already-running work can exceed them. Auto recharge has separate trigger and purchase amounts and can charge immediately when enabled below the threshold. Use https://browser-use.com/pricing for current rates.

# Quickstart

> Run browser automation in the cloud

Sandboxes are the **easiest way to run Browser-Use in production**. We handle agents, browsers, persistence, auth, cookies, and LLMs. It is also the **fastest way to deploy** - the agent runs right next to the browser, so latency is minimal.

<Note>
  Get your API key at [cloud.browser-use.com/new-api-key](https://cloud.browser-use.com/new-api-key) — eligible new accounts receive \$15 in one-time credits.
</Note>

## Basic Example

Wrap your function with `@sandbox()`:

```python theme={null}
from browser_use import Browser, sandbox, ChatBrowserUse
from browser_use.agent.service import Agent

@sandbox()
async def my_task(browser: Browser):
    agent = Agent(task="Find the top HN post", browser=browser, llm=ChatBrowserUse())
    await agent.run()

await my_task()
```

## With Cloud Parameters

```python theme={null}
@sandbox(
    cloud_profile_id='your-profile-id',      # Use saved cookies/auth
    cloud_proxy_country_code='us',           # Bypass captchas, cloudflare, geo-restrictions
    cloud_timeout=60,                        # Max session time (minutes)
)
async def task(browser: Browser, url: str):
    agent = Agent(task=f"Visit {url}", browser=browser, llm=ChatBrowserUse())
    await agent.run()

await task(url="https://example.com")
```

**What each does:**

* `cloud_profile_id` - Use saved cookies/authentication from your cloud profile
* `cloud_proxy_country_code` - Route through country-specific proxy for stealth (bypass captchas, Cloudflare, geo-blocks)
* `cloud_timeout` - Maximum time browser stays open in minutes

***

For more parameters and events, see the other tabs in this section.