browser
Lightpanda: the headless browser designed for AI and automation
Lightpanda is a headless browser built from scratch in Zig that provides an MCP server for AI agent web automation. Unlike Chromium-based browsers, it achieves 16× lower memory usage and 9× faster execution through a ground-up implementation optimized for automation workloads. The MCP server enables AI agents to navigate pages, extract data, fill forms, and control browser sessions via standard MCP JSON-RPC protocol over stdio or HTTP. It integrates with Puppeteer and Playwright via CDP protocol and includes a native agent mode supporting Anthropic, OpenAI, Gemini, and local models.
Key Features
Use Cases
- 01AI agents performing multi-step web research and data extraction workflows
- 02Automated form filling and account signup processes driven by natural language instructions
- 03Large-scale web scraping with lower infrastructure costs due to reduced memory footprint
- 04Multi-agent systems where each agent maintains isolated browsing sessions via HTTP MCP transport
- 05Prototyping browser automation with LLMs then deploying recorded scripts without runtime model costs
- 06Web testing and monitoring with Puppeteer/Playwright compatibility
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browser — FAQ
What is the Lightpanda MCP server?+
Lightpanda's MCP server is a Model Context Protocol interface to a high-performance headless browser built from scratch in Zig. It enables AI agents to control web browsing, navigate pages, extract data, and interact with forms through standard MCP JSON-RPC communication over stdio or HTTP.
How do I install and connect the Lightpanda MCP server?+
Download the binary from nightly releases or use Homebrew (brew install lightpanda-io/browser/lightpanda), then add it to your MCP client configuration with the command path and 'mcp' argument. For HTTP transport supporting multiple agents, start it with 'lightpanda mcp --port 9223' and POST JSON-RPC to the /mcp endpoint.
Which MCP clients work with Lightpanda?+
Any MCP-compatible client that supports stdio or HTTP transport can connect to Lightpanda. The documentation shows configuration examples for standard MCP client setups, and it also works with Puppeteer and Playwright via its separate CDP server mode.
Do I need API keys to use Lightpanda?+
The core MCP server and browser require no API keys. The optional agent mode (lightpanda agent) needs an LLM provider API key (ANTHROPIC_API_KEY, OPENAI_API_KEY, etc.) unless you run it with --no-llm for a basic REPL without language model assistance.
Is Lightpanda free and open source?+
Yes, Lightpanda is open source and available on GitHub under a permissive license. Binaries are available for free from nightly releases for Linux, macOS, and via Docker images for both amd64 and arm64 architectures.
What are the system requirements for running Lightpanda?+
Lightpanda runs on Linux (glibc-based distros), macOS (x86_64 and aarch64), and Windows via WSL2. Building from source requires Zig 0.15.2, Rust, and system libraries like libglib2.0-dev and clang on Linux or cmake on macOS.
How do I install browser?+
Open the source repository on GitHub and follow its README. browser is a mcp server — MCP Agents Market links you directly to the official repo.
Is browser free?+
browser is an open-source project hosted on GitHub. Check the repository for its license and any usage requirements.