Lighthouse MCP Server

@priyankark

Basic information

About Lighthouse MCP Server

Allows AI assistants such as Amp/Cline/Cursor/Claude Code/Codex/GitHub Copilot to use Google's lighthouse tool to measure perf metrics for your webpage. You can then run an agentic loop and get the assistants to optimize those metrics!

#lighthouse#web-perf#seo

Lighthouse MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "lighthouse": {
      "command": "npx",
      "args": [
        "lighthouse-mcp"
      ],
      "disabled": false,
      "autoApprove": []
    }
  }
}

Lighthouse MCP Server tools

Run a Lighthouse audit on a URL

Get just the performance score for a URL

Overview

What is Lighthouse Mcp?

Lighthouse Mcp is an MCP server that wraps Google’s Lighthouse tool to measure performance, accessibility, SEO, and other web page metrics. It is designed for developers and site owners who want automated audits through MCP‑compatible clients like Claude.

How to use Lighthouse Mcp?

Install via the MCP Registry, npx lighthouse-mcp, npm install -g lighthouse-mcp, or local clone and build. Then add a lighthouse entry to your MCP settings file with the appropriate command and args. Once configured, ask Claude or another MCP client to audit a URL.

Key features of Lighthouse Mcp

Run comprehensive Lighthouse audits on any URL
Get performance scores and metrics
Configure device emulation (mobile/desktop)
Control network throttling on/off
Select specific audit categories (performance, accessibility, best‑practices, SEO, PWA)

Use cases of Lighthouse Mcp

Audit a web page’s performance score before a release
Compare mobile vs desktop performance for a site
Check accessibility and SEO compliance automatically
Integrate Lighthouse audits into an AI‑assisted development workflow
Test how throttling affects page load metrics

Frequently asked questions

What are the runtime requirements?

Node.js 16 or later and a Chrome/Chromium browser installed on the system.

How do I install Lighthouse Mcp?

You can install via the MCP Registry, run directly with `npx lighthouse-mcp`, install globally with `npm install -g lighthouse-mcp`, or clone the repo and build locally.

What parameters does the `run_audit` tool accept?

It requires a `url`, and optionally accepts `categories` (array from "performance", "accessibility", "best-practices", "seo", "pwa"), `device` ("mobile" or "desktop", default "mobile"), and `throttling` (boolean, default true).

Can I get only the performance score without a full audit?

Yes, the `get_performance_score` tool returns just the performance score for a URL, with an optional `device` parameter.

Does Lighthouse Mcp work with Claude Desktop?

Yes, it is designed for use with MCP clients including Claude Desktop; example usage shows asking Claude for a performance score.

Comments

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