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How to let your coding agent debug a page in a real Chrome with Chrome DevTools MCP

Add the MCP server so the agent can open your app, read the console and network, and screenshot the result.

Short answer: Add an mcpServers entry named chrome-devtools that runs npx with chrome-devtools-mcp@latest; then Restart your MCP client so the tools load; ask the agent to open your local app and report console messages and failed network requests. All steps.

Who it is forA frontend developer whose agent keeps 'fixing' bugs it never actually saw in the browser.

The problemAgents edit code blind and claim a fix works without loading the page.

The outcomeAn agent that opens the page, reads console errors and failed requests, fixes the code and checks again.

What you need first

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

Steps

  1. Add an mcpServers entry named chrome-devtools that runs npx with chrome-devtools-mcp@latest
  2. Restart your MCP client so the tools load
  3. Ask the agent to open your local app and report console messages and failed network requests
  4. Have it fix the cause and take a screenshot to confirm

Prompt for your agent

Add ChromeDevTools/chrome-devtools-mcp to my MCP config, open http://localhost:<port>, list every console error and failed network request with its source-mapped stack, fix the top one, and take a screenshot after the fix.

Caveat. The server exposes everything in that browser to the MCP client; do not use a profile that is signed in to sensitive accounts.

Use this in your AI agent

Ask your agent

Using the Deduped MCP, get the setup steps for ChromeDevTools/chrome-devtools-mcp and "Let your coding agent debug a page in a real Chrome"

Add Deduped to Claude Code once

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

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