MCP server for Google Lighthouse performance metrics
An MCP server that wraps around Google's Lighthouse tool to help measure various performance metrics for web pages.
This server is available in the Model Context Protocol Registry. Install it using your MCP client or Claude Desktop.
You can run the tool directly using npx without installation:
npx lighthouse-mcp
Install the package globally from npm:
npm install -g lighthouse-mcp
Then run it:
lighthouse-mcp
npm install
npm run build
npm start
Add the following to your MCP settings configuration file:
{
"mcpServers": {
"lighthouse": {
"command": "npx",
"args": ["lighthouse-mcp"],
"disabled": false,
"autoApprove": []
}
}
}
Add the following to your MCP settings configuration file:
{
"mcpServers": {
"lighthouse": {
"command": "node",
"args": ["/absolute/path/to/lighthouse-mcp/build/index.js"],
"disabled": false,
"autoApprove": []
}
}
}
Replace /absolute/path/to/lighthouse-mcp with the actual path to this project.
Run a comprehensive Lighthouse audit on a URL.
Parameters:
url (required): The URL to auditcategories (optional): Array of categories to audit (defaults to all)
device (optional): Device to emulate (defaults to "mobile")
throttling (optional): Whether to apply network throttling (defaults to true)Example:
{
"url": "https://example.com",
"categories": ["performance", "accessibility"],
"device": "desktop",
"throttling": false
}
Get just the performance score for a URL.
Parameters:
url (required): The URL to auditdevice (optional): Device to emulate (defaults to "mobile")
Example:
{
"url": "https://example.com",
"device": "mobile"
}
Once the MCP server is configured, you can use it with Claude:
What's the performance score for example.com?
Claude will use the get_performance_score tool to analyze the website and return the results.
Source-derived launch command. Check the maintainer’s required arguments and credentials before running:
npx -y lighthouse-mcpMerge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.
{
"mcpServers": {
"io-github-priyankark-lighthouse-mcp": {
"command": "npx",
"args": [
"-y",
"lighthouse-mcp"
]
}
}
}Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.
Claude Desktop setup referenceio.github.priyankark/lighthouse-mcp works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.
~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.~/.cursor/mcp.jsonRestart Cursor for changes to take effect..vscode/mcp.jsonReload VS Code window for changes to take effect.~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect..mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.