lighthouse-mcp

MCP.Pizza Chef: priyankark

Two abilities are on offer: a full Lighthouse audit of a web address, and a quick performance score on its own. You choose phone or desktop, whether to simulate a slow connection, and which categories to grade, and all three of those choices genuinely take effect. No account or key is needed, but Chrome or Chromium has to be installed on your computer, because the audit really loads the page. The README still lists a progressive web app category that current Lighthouse no longer produces.

Coding

Web/Research

Use This MCP server To

Check how fast my homepage loads on a phone Get an accessibility score for a page I just changed Compare a page with and without slow-connection simulation Ask what is slowing my page down and what to fix first Audit my site on localhost before I publish it

README

Lighthouse MCP Server

An MCP server that wraps around Google's Lighthouse tool to help measure various performance metrics for web pages.

Features

Run comprehensive Lighthouse audits on any URL
Get performance scores and metrics
Configure device emulation (mobile/desktop)
Control network throttling
Select specific audit categories

Installation

Option 1: From MCP Registry (Recommended)

This server is available in the Model Context Protocol Registry. Install it using your MCP client or Claude Desktop.

Option 2: Using npx

You can run the tool directly using npx without installation:

npx lighthouse-mcp

Option 3: Global Installation

Install the package globally from npm:

npm install -g lighthouse-mcp

Then run it:

lighthouse-mcp

Option 4: Local Development

lighthouse-mcp FAQ

Do I need a key or an account?

No. It runs Google's Lighthouse on your own machine, so there is nothing to sign up for and no per-use cost.

Do I need anything installed?

Yes. Chrome or Chromium must already be on your computer, along with a reasonably recent version of Node.

Can I use this to test a page running on my own computer?

Yes for a localhost address. Pages on private network addresses such as 192.168 ones are refused on purpose.

Can it fix what it finds?

No, it only measures. A coding assistant can then read the report and make the changes itself.

Which apps does it work in?

It is published in the official MCP registry and is used with Claude Desktop, Claude Code, Cursor, Cline, Codex, and GitHub Copilot.

Can I ask for a progressive web app score?

No. The README still offers that category, but the Lighthouse version underneath stopped producing it.

How hard is setup?

Easy. You paste a short settings block that runs it on demand, with no building and no tokens.

Is it still maintained?

Yes, with the most recent code changes landing in May 2026.