MCP Servers

web-perf-mcp

MCP server that audits web pages using Lighthouse and Puppeteer to find performance bottlenecks and generate CPU profiles for optimization.

Category

README

web-perf-mcp

MCP Server that audits the web page for finding the bottlenecks and CPU profiling using Lighthouse and Puppeteer.

Features

CPU Profiling: Capture CPU profiling using devtools protocol and generate flamegraphs.
Source Map Resolution: Map minified code back to original source files and lines.
Stack Trace Generation: Generate stack trace for hot functions.
Optimization Recommendations: Provide recommendations to optimize the code.

How to use

Add the MCP Server - Example Windsurf Config

{
  "mcpServers": {
    "web-perf-mcp": {
      "command": "npx",
      "args": ["web-perf-mcp"]
    }
  }
}

Available Tools

run_audit

Run a performance audit with CPU profiling on a web page using Lighthouse and Puppeteer

Parameters

url: URL to audit
device: Device type for emulation (desktop|mobile)
profile: Enable CPU profiling (default: false)
headless: Run in headless mode (default: true)

analyze_data

Analyze CPU profile and/or trace events data to generate performance insights and recommendations

Parameters

cpuProfilePath: Absolute path to the CPU profile JSON file (required for CPU analysis)
traceEventsPath: Absolute path to the trace events JSON file.

Usage as CLI

npx web-perf-mcp

npm i -g web-perf-mcp

Run audit and analyze profile

// run Audit for a website
npx web-perf-mcp audit --url https://example.com --profile

// analyze CPU profile and provide recommendations
npx web-perf-mcp analyze --profile path/to/profile

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