Lightpanda: a lightweight headless browser for agents

When an agent has to read a few hundred pages, the expensive part is usually the row of Chromium processes behind it. Lightpanda isn’t a Chromium fork. It’s a new headless browser written in Zig that runs JavaScript on V8 but skips rendering, and lightpanda mcp turns it into an MCP server. It had about 36k stars as of 2026-10-06.

What it does

• Reading pages: goto opens a URL, markdown turns the page or a subtree into Markdown, links lists links and tree returns the node tree, all much shorter than raw HTML.
• Basic interaction: click and fill act on nodes or selectors, and evaluate runs a script in the page.
• Isolated sessions: in HTTP mode (--port), each connection gets its own page, cookies and memory. session_new, session_list and session_close manage sessions, and agents that share one Mcp-Session-Id can work the same page together.
• Sessions as scripts: save exports a session as a PandaScript you can replay with lightpanda run, with no model tokens spent.

Who it’s for

• Anyone whose agent crawls and summarizes lots of pages and doesn’t want a Chromium per task.
• Teams running web tasks on servers or in containers where memory matters. The README’s benchmark puts peak memory for 100 pages at about 123 MB, against roughly 2 GB for headless Chrome.

Setup

Runs on Linux and macOS (Windows only through WSL). Install the nightly build with Homebrew:

brew install lightpanda-io/browser/lightpanda

Then point your client at the binary:

{
  "mcpServers": {
    "lightpanda": {
      "command": "/path/to/lightpanda",
      "args": ["mcp"]
    }
  }
}

Our take

Next to Playwright MCP, Lightpanda wins on volume: for reading and extracting it drops the cost of a full browser, and the multi-session HTTP mode lets several agents share one process. The trade-off is compatibility. Its Web API coverage is still growing, so heavy front-end apps and anything that needs screenshots or visual judgment are safer with a Chromium-based tool. It also sends usage telemetry by default; set LIGHTPANDA_DISABLE_TELEMETRY=true to turn it off. Licensed AGPL-3.0, which matters if you modify it and offer it as a service.