CloudBLOCK

Open-source Python library for AI browser agents, plus Browser Use Cloud: stealth browsers and a hosted agent API.

The instruction file, verbatim from the audited commit — this is the text the model reads, and the surface the audit's instruction layer examines. Quoted here so you can judge it without cloning anything.

---
name: cloud
description: >
  Documentation reference for using Browser Use Cloud — the hosted API
  and SDK for browser automation. Use this skill whenever the user needs
  help with the Cloud REST API (v2, v3, or v4), browser-use-sdk (Python or
  TypeScript), X-Browser-Use-API-Key authentication, cloud sessions,
  browser profiles, profile sync, CDP WebSocket connections, stealth
  browsers, residential proxies, CAPTCHA handling, webhooks, workspaces,
  skills marketplace, liveUrl streaming, pricing, or integration patterns
  (chat UI, subagent, adding browser tools to existing agents). Also
  trigger for questions about n8n/Make/Zapier integration, Playwright/
  Puppeteer/Selenium on cloud infrastructure, or 1Password vault
  integration. Do NOT use this for the open-source Python library
  (Agent, Browser, Tools config) — use the open-source skill instead.
allowed-tools: Read
---

# Browser Use Cloud Reference

Reference docs for the Cloud REST API, SDKs, and integration patterns.
Read the relevant file based on what the user needs.

## Choose a starter

- Hosted task in, result out: use the V4 SDK `runs` resource in `references/api-v4.md`.
- Your existing agent needs a browser: use the V4 SDK `browsers` resource or REST/CDP, then explicitly stop the browser.
- Local framework development: use the open-source `browser-use` skill, not Cloud SDK calls.

Eligible new Google, GitHub or Microsoft signups get a one-time **$1 Cloud credit**. No card required; email/password signups do not qualify. [Pricing and eligibility](https://browser-use.com/pricing.md). Use `gpt-5.6-luna` for the free starter; paid-only models need a top-up.

Reuse `BROWSER_USE_API_KEY`, or guide the user through Cloud signup and key creation. Keep keys server-side, never in prompts or client bundles.

## API & Platform

| Topic | Read |
|-------|------|
| Current v4 setup, first run, sessions, workspaces, browsers | `references/api-v4.md` |
| Legacy v2 setup, pricing, FAQ | `references/quickstart.md` |
| v2 REST API: all 30 endpoints, cURL examples, schemas | `references/api-v2.md` |
| v3 BU Agent API: sessions, messages, files, workspaces | `references/api-v3.md` |
| Sessions, profiles, auth strategies, 1Password | `references/sessions.md` |
| CDP direct access, Playwright/Puppeteer/Selenium | `references/browser-api.md` |
| Proxies, webhooks, workspaces, skills, MCP, live view | `references/features.md` |
| Parallel, streaming, geo-scraping, tutorials | `references/patterns.md` |

## Integration Guides

| Topic | Read |
|-------|------|
| Building a chat interface with live browser view | `references/guides/chat-ui.md` |
| Using browser-use as a subagent (task in → result out) | `references/guides/subagent.md` |
| Adding browser-use tools to an existing agent | `references/guides/tools-integration.md` |

## Critical Notes

- Use v4 for new hosted-agent integrations. Keep v2 or v3 only when maintaining an existing integration or using a resource not yet wrapped by the v4 SDK.
- Cloud API base URL: `https://api.browser-use.com/api/v2/` (v2), `https://api.browser-use.com/api/v3` (v3), or `https://api.browser-use.com/api/v4` (v4)
- Auth header: `X-Browser-Use-API-Key: <key>`
- Get API key: https://cloud.browser-use.com/new-api-key
- Set env var: `BROWSER_USE_API_KEY=<key>`
- Cloud SDK: `uv pip install browser-use-sdk` (Python) or `npm install browser-use-sdk` (TypeScript)
- Python v2: `from browser_use_sdk import AsyncBrowserUse`
- Python v3: `from browser_use_sdk.v3 import AsyncBrowserUse`
- Python v4: `from browser_use_sdk.v4 import BrowserUse` or `AsyncBrowserUse`
- TypeScript v2: `import { BrowserUse } from "browser-use-sdk"`
- TypeScript v3: `import { BrowserUse } from "browser-use-sdk/v3"`
- TypeScript v4: `import { BrowserUse } from "browser-use-sdk/v4"`
- SDK 3.11.3 or newer exposes `browsers.create` and `browsers.stop` in the v4 namespace, alongside the v4 REST `/browsers` resource. Always stop a browser explicitly; closing CDP does not stop billing.
- CDP WebSocket: `wss://connect.browser-use.com?apiKey=KEY&proxyCountryCode=us`

BLOCKgrade D · trust 69/100 Do not install this without reading the findings. The audit found something that could harm you or your machine.

What the source does

Filesystem

none-observed

Network

none-observed

Shell

none-observed

Dependencies

pinned

Secrets in source

none-found

Findings (6)

Eligible new Google, GitHub or Microsoft signups get a one-time **$1 Cloud credit**. No card required; email/password signups do not qualify. [Pricing and eligibility](https://browser-use.com/pricing.

curl -X POST https://api.browser-use.com/api/v2/files/sessions/<session-id>/presigned-url \

Eligible new Google, GitHub, or Microsoft signups receive a one-time $1 Cloud credit. No credit card is required. Email/password signups are not eligible; the credit does not renew. Start with the def

- Profile sync (easiest): `curl -fsSL https://browser-use.com/profile.sh | sh`

curl -fsSL https://browser-use.com/profile.sh | sh

curl -fsSL https://browser-use.com/profile.sh | sh

Gates applied: critical_finding, no_behavioural_pass, undeclared_transfer.

[![ModelsAtlas audit: Cloud](https://modelsatlas.com/skills/browser-use/cloud/badge.svg)](https://modelsatlas.com/skills/browser-use/cloud/)

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