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How to have an agent record a performance trace and explain it with Chrome DevTools MCP

Ask the agent to check a page's performance; it records a DevTools trace and pulls out actionable insights.

Short answer: Install the MCP server in your client; then Prompt: Check the performance of https://developers.chrome.com (or your own URL); read the insights the agent extracts from the trace. All steps.

Who it is forA developer chasing a slow page load who does not want to read flame charts.

The problemPerformance traces are dense and hard to turn into fixes.

The outcomeA short list of the biggest performance problems on the page and what to change.

What you need first

  • Node.js and npm
  • Chrome
  • An MCP client or a coding agent that can run shell commands

Steps

  1. Install the MCP server in your client
  2. Prompt: Check the performance of https://developers.chrome.com (or your own URL)
  3. Read the insights the agent extracts from the trace
  4. Ask it to apply the top fix and re-run the trace

Prompt for your agent

Using ChromeDevTools/chrome-devtools-mcp, record a performance trace of <url>, list the top 3 insights with their likely cause in my code, and re-measure after fixing the first one.

Caveat.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for ChromeDevTools/chrome-devtools-mcp and "Have an agent record a performance trace and explain it"

Add Deduped to Claude Code once

claude mcp add --transport http deduped https://dedupedai.com/mcp

Cursor, ChatGPT, others

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