Summary
Connects Claude to the npm registry and Bundlephobia API for package research and dependency analysis. You get five tools: search packages by keyword, pull detailed metadata on any package including maintainers and npm scores, audit a package.json for outdated or vulnerable dependencies using npm's bulk advisory API, check bundle sizes with minified and gzipped estimates, and compare multiple packages side by side on downloads, size, and GitHub stars. Useful when you're evaluating libraries, auditing projects for security issues, or need to justify package choices with hard numbers during code review.
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
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MCP server providing npm and Node.js package management tools for AI agents.
Tools
npm_search
Search the npm registry for packages by keyword. Returns name, description, version, weekly downloads, and last publish date.
npm_package_info
Get detailed information about a specific npm package: all published versions, dependencies, maintainers, repository URL, license, unpacked size, npm quality/popularity/maintenance scores, and weekly download count.
npm_dependency_audit
Analyze a package.json file to find outdated dependencies (compares pinned/range version against latest), deprecated packages, and known security vulnerabilities via the npm bulk advisory API.
npm_bundle_size
Estimate the bundle size of an npm package using the Bundlephobia API. Returns minified size, gzipped size, dependency count, and tree-shaking support indicators.
npm_compare_packages
Compare two or more packages side by side across multiple dimensions: weekly downloads, bundle size, number of runtime dependencies, last publish date, GitHub stars, and license.
Setup
npm install
npm run build
Usage with Claude Desktop
Add to your claude_desktop_config.json:
{
"mcpServers": {
"npm-tools": {
"command": "node",
"args": ["D:/products/mcp-servers/mcp-npm-tools/dist/index.js"]
}
}
}
Development
npm run build # compile TypeScript
npm start # run the server
License
MIT
Featured
Keeps your Mac awake while Claude Code, Codex or Cursor works. Lets it sleep when they are done.
Try free for 7 days →Block distracting apps from your iPhone permanently without a 3rd party app. Free and open source.
Block now (100% free) →Notes, actions and memory. Without a meeting bot. First month 100% off.
Download for free →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Free an open-source skills that make AI coding agents easier to understand, verify, and control.
Download for free →Connect your Claude agent to live crypto prices and trading routes via 1inch
Get the MCP →Categories
Registryactive
Package@rog0x/mcp-npm-tools
TransportSTDIO
UpdatedMar 22, 2026
