PageSpeed Insights MCP server

This MCP server provides Google PageSpeed Insights analysis through a standardized interface, allowing AI models to analyze webpage performance metrics and receive actionable improvement suggestions.

Installation

Using NPX (Easiest Method)

You can run the server directly using npx:

npx mcp-server-pagespeed

Manual Installation

To install and set up the server locally:

git clone https://github.com/enemyrr/mcp-server-pagespeed.git
cd mcp-server-pagespeed
npm install
npm run build

Setting Up in Cursor IDE

To add the server to your Cursor IDE:

1. First complete the manual installation steps above
2. Open Command Palette (Cmd/Ctrl + Shift + P)
3. Search for "MCP: Add Server"
4. Fill in the following details:
   • Name: pagespeed
   • Type: command
   • Command: node /absolute/path/to/mcp-server-pagespeed/build/index.js

Note: Be sure to replace /absolute/path/to/ with the actual path where you cloned the project.

Usage

Analyzing a Webpage

The server provides a single tool called analyze_pagespeed that you can use to analyze any webpage:

use_mcp_tool({
  server_name: "pagespeed",
  tool_name: "analyze_pagespeed",
  arguments: {
    url: "https://example.com"
  }
});

Understanding the Results

The analysis results include:

• Overall performance score (on a scale of 0-100)
• Loading experience metrics:
  • First Contentful Paint
  • First Input Delay
• Top 5 improvement suggestions, each containing:
  • Title of the suggestion
  • Detailed description
  • Potential performance impact
  • Current measured value

Error Handling

The server provides meaningful error messages for common issues:

• Invalid URL formats
• Failed API requests
• Network connection problems
• Invalid tool calls

If you encounter an error, check the provided message for troubleshooting guidance.

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "pagespeed" '{"command":"npx","args":["mcp-server-pagespeed"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "pagespeed": {
            "command": "npx",
            "args": [
                "mcp-server-pagespeed"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "pagespeed": {
            "command": "npx",
            "args": [
                "mcp-server-pagespeed"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect