# Build AI Agent Browser Automation with TestMu AI Browser Cloud
<p align="center">
<a href="https://www.testmuai.com/"><img src="https://img.shields.io/badge/MADE%20BY%20TestMu%20AI-000000.svg?style=for-the-badge&labelColor=000" alt="Made by TestMu AI"></a>
<a href="https://www.npmjs.com/package/@testmuai/browser-cloud"><img src="https://img.shields.io/npm/v/@testmuai/browser-cloud.svg?style=for-the-badge&labelColor=000000" alt="Browser Cloud version"></a>
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</p>
## Getting Started
[TestMu AI](https://www.testmuai.com/) (Formerly LambdaTest) is the world's first full-stack AI Agentic Quality Engineering platform that empowers teams to test intelligently, smarter, and ship faster. Built for scale, it offers a full-stack testing cloud with 10K+ real devices and 3,000+ browsers. With AI-native test management, MCP servers, and agent-based automation, TestMu AI supports Selenium, Appium, Playwright, and all major frameworks.
With TestMu AI (Formerly LambdaTest), you can give any AI agent a real cloud browser to automate web tasks at scale. This sample provides a ready-to-use agent skill for TestMu AI Browser Cloud — load it into Claude, Cursor, or any LLM tool that supports custom instructions, and your agent can write production-grade browser automation code on demand.
- [Sign up on TestMu AI](https://www.testmuai.com/register/) (Formerly LambdaTest).
- Follow the [TestMu AI Documentation](https://www.testmuai.com/support/docs/) for the full setup walkthrough.
### Prerequisites
- Node.js 16+ (18+ for Playwright adapter)
- npm
- A TestMu AI (Formerly LambdaTest) account with your username and access key
### Setup
Clone and install dependencies:
```bash
git clone https://github.com/LambdaTest/browser-cloud-skills && cd browser-cloud-skills
npm install
```
Set your credentials as environment variables.
**macOS / Linux:**
```bash
export LT_USERNAME="YOUR_USERNAME"
export LT_ACCESS_KEY="YOUR_ACCESS_KEY"
```
**Windows:**
```bash
set LT_USERNAME="YOUR_USERNAME"
set LT_ACCESS_KEY="YOUR_ACCESS_KEY"
```
Install the Browser Cloud SDK:
```bash
npm install @testmuai/browser-cloud
```
### Run tests
Load the skill into your AI tool:
- **Claude / Claude.ai (Projects):** Copy the contents of `browser-cloud/SKILL.md` into a Project instruction or system prompt.
- **Cursor:** Add to `.cursor/rules/browser-cloud.mdc` or paste into Cursor Settings → Rules for AI.
- **Any other LLM tool:** Paste `browser-cloud/SKILL.md` as a system prompt or instruction file.
Then ask your agent to build browser automation:
```
Write me an agent that scrapes competitor pricing from three URLs in parallel
```
View results on your TestMu AI dashboard.
### Local testing with TestMu AI Tunnel
To test locally hosted apps, set up the TestMu AI tunnel. OS-specific guides:
- [Local Testing on Windows](https://www.testmuai.com/support/docs/local-testing-for-windows/)
- [Local Testing on macOS](https://www.testmuai.com/support/docs/local-testing-for-macos/)
- [Local Testing on Linux](https://www.testmuai.com/support/docs/local-testing-for-linux/)
Add the following to your capabilities:
```js
tunnel: true,
```
## Contributions
Contributions are welcome. Open an issue to discuss your idea before submitting a pull request. When reporting bugs, include your Node.js version, OS, and browser automation framework version.
## TestMu AI (Formerly LambdaTest) Community
Connect with testers and developers in the [TestMu AI Community](https://community.testmuai.com/). Ask questions, share what you are building, and discuss best practices in test automation and DevOps.
## TestMu AI (Formerly LambdaTest) Certifications
Earn free [TestMu AI Certifications](https://www.testmuai.com/certifications/) for testers, developers, and QA engineers. Validate your skills in Selenium, Cypress, Playwright, Appium, Espresso and more. Industry-recognized, shareable on LinkedIn, and built by practitioners, not marketers.
## Learning Resources by TestMu AI (Formerly LambdaTest)
Learn modern testing through tutorials, guides, videos, and weekly updates:
* [TestMu AI Blog](https://www.testmuai.com/blog/)
* [TestMu AI Learning Hub](https://www.testmuai.com/learning-hub/)
* [TestMu AI on YouTube](https://www.youtube.com/@TestMuAI)
* [TestMu AI Newsletter](https://www.testmuai.com/newsletter/)
## LambdaTest is Now TestMu AI
On **January 12, 2026**, [LambdaTest evolved to TestMu AI](https://www.testmuai.com/lambdatest-is-now-testmuai/), the world's first fully autonomous **Agentic AI Quality Engineering Platform**.
Same team. Same infrastructure. Same customer accounts. All existing LambdaTest logins, scripts, capabilities, and integrations continue to work without change.
👉 Find the new home for [LambdaTest](https://www.testmuai.com).
### How LambdaTest Evolved into TestMu AI
In 2017, we launched LambdaTest with a simple mission: make testing fast, reliable, and accessible. As LambdaTest grew, we expanded into Test Intelligence, Visual Regression Testing, Accessibility Testing, API Testing, and Performance Testing, covering the full depth of the testing lifecycle.
As software development entered the AI era, testing had to evolve, too. We rebuilt the architecture to be AI-native from the ground up, with autonomous agents that **plan, author, execute, analyze, and optimize tests** while keeping humans in the loop. The platform integrates with your repos, CI, IDEs, and terminals, continuously learning from every code change and development signal.
That evolution earned a new name: **TestMu AI**, built for an AI-first future of quality engineering. TestMu is not a new name for us. It is the name of our annual community conference, which has brought together 100,000+ quality engineers to discuss how AI would reshape testing, long before that became an industry norm.
What started as a high-performance cloud testing platform has transformed into an AI-native, multi-agent system powering a connected, end-to-end quality layer. That evolution defined a new identity: LambdaTest evolved into TestMu AI, built for an AI-first future of quality engineering.
## Support
Got a question? Email [support@testmuai.com](mailto:support@testmuai.com) or chat with us 24x7 from our chat portal.