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How to connect GTmetrix to Claude

Connect Claude Web, Desktop and Cowork to GTmetrix MCP. Run a performance test on your homepage, check latest gtmetrix report for example.com, and more using natural language, with authentication handled for you.

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GTmetrix is a web performance analysis tool that tests and reports on site speed. It helps developers and teams identify bottlenecks and optimize web applications for a better user experience.

16 Tools

Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your GTmetrix account to Claude via Composio Connect, enabling it to run a performance test on your homepage, check latest GTmetrix report for example.com, list top optimization recommendations for your site, and more such actions on your behalf without compromising your account security.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate GTmetrix with

Claude CodeOpenAI Agents SDKClaude Agent SDKGrok BotCodexOpenClawHermesAtomic AgentGoogle ADKLangChainVercel AI SDKMastra AILlamaIndexCrewAIPydantic AIAutoGen

Connecting GTmetrix to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

2. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Web, Desktop, and Cowork

3. Connect your GTmetrix account

Back in Claude, ask it to connect to GTmetrix or give it any GTmetrix-related task.

For example, ask Claude to:

  • "Run a performance test on your homepage"
  • "Check latest GTmetrix report for example.com"
  • "List top optimization recommendations for your site"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Claude, and your GTmetrix account is ready to use.

What is the GTmetrix Claude Connector, and what's possible with it?

The GTmetrix MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your GTmetrix account. It provides structured and secure access so your agent can perform GTmetrix operations on your behalf.

Troubleshooting

1. Why does Claude not use the Composio connector for GTmetrix?

The connector can show as connected, but Claude must use it in each GTmetrix conversation.

  • Click + at the lower left of the chat, or type /.
  • Hover Connectors.
  • Turn on Composio.
  • Ask Claude to connect to GTmetrix again.

2. Why does Claude show an MCP server error before GTmetrix connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for GTmetrix.

  • Check that the connector URL is https://connect.composio.dev/mcp.
  • Connectors run from Anthropic's cloud, so your device network is usually not the problem.
  • Add the connector again from Customize > Connectors, then ask Claude to connect GTmetrix.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the GTmetrix authorization link not work?

The Composio connector is one server. Your GTmetrix account connects separately when Claude asks for it.

  • If the browser does not open, or the link expires, ask Claude to retry the GTmetrix connection.
  • Composio creates a fresh GTmetrix authorization link.
  • Open that link in your browser and finish the GTmetrix sign-in.

4. Why do GTmetrix actions fail after they worked before?

The GTmetrix connection can expire or lose permission.

  • Ask Claude to inspect the GTmetrix connection.
  • If the connection is unhealthy, disconnect it when Claude prompts you.
  • Reconnect the GTmetrix account and retry the action.
  • If Claude shows a permission prompt, approve it before Claude changes data in GTmetrix.
  • If the action still fails with a permission error, check that the connected account has that permission in GTmetrix itself.

5. How do I switch to a different GTmetrix account?

Claude can manage the GTmetrix connection for you.

  • Ask Claude to disconnect or delete the current GTmetrix account.
  • Ask Claude to connect GTmetrix again.
  • Open the new Composio authorization link for GTmetrix.
  • Sign in with the other GTmetrix account in the browser.
  • After the account connects, ask Claude to retry the GTmetrix task.

6. Why is my GTmetrix connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your GTmetrix connection works in Claude Web, Desktop, and Cowork.

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If GTmetrix tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
  • On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect GTmetrix.
TOOLS

Supported Tools

Every GTmetrix action and event your agent gets out of the box.

Delete Page

Tool to delete a specific page in GTmetrix.

Delete Report

Tool to delete a GTmetrix report.

Get Browsers

Tool to retrieve the list of available browsers for GTmetrix performance tests.

Get Location Details

Tool to retrieve location details from GTmetrix.

Get Locations

Tool to retrieve the list of available GTmetrix test locations.

Get Page Details

Tool to retrieve page details from the user's GTmetrix account.

Get Page Reports

Tool to retrieve the report list associated with a monitored page in GTmetrix.

Get Pages

Tool to retrieve the page list from your GTmetrix account.

Get Report

Tool to retrieve a GTmetrix test report by its identifier.

Get Simulated Device

Tool to retrieve simulated device details.

Get Simulated Devices

Tool to retrieve the list of simulated devices available in GTmetrix.

Get API Account Status

Tool to retrieve the current API account state and remaining credits.

Get Test Details

Tool to retrieve test details for a specific GTMetrix test.

Get Tests

Tool to retrieve the test list from your GTmetrix account with pagination and filtering support.

Retest Report

Tool to initiate a retest of a completed GTmetrix report with same parameters.

Start Test

Tool to start a new GTmetrix test for a specified URL.

FRAMEWORKS

How to build GTmetrix MCP Agent with another framework

Claude Code logo

Claude Code

Use GTmetrix MCP with Claude Code

OpenAI Agents SDK logo

OpenAI Agents SDK

Use GTmetrix MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use GTmetrix MCP with Claude Agent SDK

Grok Bot logo

Grok Bot

Use GTmetrix MCP with Grok Bot

Codex logo

Codex

Use GTmetrix MCP with Codex

OpenClaw logo

OpenClaw

Use GTmetrix MCP with OpenClaw

Hermes logo

Hermes

Use GTmetrix MCP with Hermes

Atomic Agent logo

Atomic Agent

Use GTmetrix MCP with Atomic Agent

Google ADK logo

Google ADK

Use GTmetrix MCP with Google ADK

LangChain logo

LangChain

Use GTmetrix MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use GTmetrix MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use GTmetrix MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use GTmetrix MCP with LlamaIndex

CrewAI logo

CrewAI

Use GTmetrix MCP with CrewAI

Pydantic AI logo

Pydantic AI

Use GTmetrix MCP with Pydantic AI

AutoGen logo

AutoGen

Use GTmetrix MCP with AutoGen

FAQ

Frequently asked questions

With a standalone GTmetrix MCP server, the agents and LLMs can only access a fixed set of GTmetrix tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from GTmetrix and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right GTmetrix tools.

Yes, absolutely. You can configure which GTmetrix scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your GTmetrix data and credentials are handled as safely as possible.

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