> ## 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.

# Basics

> Skills are your API for anything. Describe what you need in plain text, and get a production-ready API endpoint you can call repeatedly.

To learn more visit [Skills - Concepts](/cloud/guides/skills). Skills are retired: existing skills still run, but new ones can no longer be created.

## Quick Example

Load `['*']` for all skills or specific skill IDs from [cloud.browser-use.com/skills](https://cloud.browser-use.com/skills).

```python theme={null}
from browser_use import Agent, ChatBrowserUse

agent = Agent(
    task='Your task',
    skills=['skill-uuid-1', 'skill-uuid-2'],  # Specific skills (recommended)
    # or
    # skills=['*'],  # All skills
    llm=ChatBrowserUse()
)

await agent.run()
```

<Info>
  Be careful using `*`. Each skill will contribute around 200 tokens to the prompt.
</Info>

Remember to add your API key to `.env`:

```bash .env theme={null}
BROWSER_USE_API_KEY=your-api-key
```

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

## Cookie Handling

Cookies are automatically injected from your browser:

```python theme={null}
agent = Agent(
    task='Post a tweet saying "Hello World"',
    skills=['tweet-poster-skill-id'],
    llm=ChatBrowserUse()
)

# Agent navigates to twitter.com, logs in if needed,
# extracts cookies, and passes them to the skill automatically
await agent.run()
```

If cookies are missing, the LLM sees which cookies are needed and navigates to obtain them.

***

## Full Example

```python theme={null}
from browser_use import Agent, ChatBrowserUse
from dotenv import load_dotenv
import asyncio

load_dotenv()

async def main():
    agent = Agent(
        task='Analyze TikTak and Instegram profiles',
        skills=[
            'a582eb44-e4e2-4c55-acc2-2f5a875e35e9',  # TikTak Profile Scraper
            'f8d91c2a-3b4e-4f7d-9a1e-6c8e2d3f4a5b',  # Instegram Profile Scraper
        ],
        llm=ChatBrowserUse()
    )

    await agent.run()
    await agent.close()

asyncio.run(main())
```

Browse your existing skills at [cloud.browser-use.com/skills](https://cloud.browser-use.com/skills). Creating new skills is no longer available; for new work use [rerunnable scripts](/cloud/agent/scripts).