About Mcp Server Npm Plus
Mcp Server Npm Plus lets developers research npm packages through an AI assistant, bringing package details, download data, bundle sizes, vulnerabilities, and dependency trees into MCP clients.
Key features
- 01Search npm packages
- 02Inspect package details and dependencies
- 03View download counts and trends
- 04Compare package downloads
- 05Check bundle sizes and vulnerabilities
Use cases
- 01Compare npm packages before choosing one
- 02Check a package’s bundle size
- 03Review known vulnerabilities
- 04Inspect dependency trees and download trends
MCP support
It exposes npm research tools to MCP clients, using public npm registry APIs and requiring no API keys.
Configuration
Local server config is the same for every client. Copy it into your client’s MCP config file.
Tools
8Saved tool list · updated 3w ago
| Parameter | Type | Required | Description |
|---|---|---|---|
| query | string | Yes | Search query (e.g. 'react state management') |
| size | integer | No | Number of results (default 10) |
Details
From the project READMEmcp-server-npm-plus
npm package research from your AI assistant. Search packages, check bundle sizes, scan for vulnerabilities, compare download counts, and inspect dependency trees. No API keys needed.
npx mcp-server-npm-plus
Works with Claude Desktop, Cursor, VS Code Copilot, and any MCP client. Uses public npm registry APIs.
Demo built with remotion-readme-kit
Why
Choosing between npm packages usually means opening a bunch of browser tabs: npm for package info, Bundlephobia for size, Snyk for vulnerabilities, npm trends for download comparisons. This server puts all of that in one place, accessible through your AI assistant. Ask "compare zustand vs jotai vs valtio" and get download numbers, bundle sizes, and dependency counts side by side. Ask "are there any known vulnerabilities in express?" and get the answer without leaving your editor. It uses only public npm APIs, so there's nothing to sign up for.
Tools
| Tool | Description |
|---|---|
search | Search npm packages by query |
package_info | Get detailed info: description, license, repo, dependencies |
downloads | Get download stats for a package |
compare_downloads | Compare download counts across multiple packages |
bundle_size | Get bundle size (minified + gzip) via Bundlephobia |
vulnerabilities | Get vulnerability info and advisory links |
dependency_tree | Show direct dependencies as a tree |
download_trends | Daily breakdown with sparkline |
Quick Start
Cursor
Add to .cursor/mcp.json:
{
"mcpServers": {
"npm-plus": {
"command": "npx",
"args": ["mcp-server-npm-plus"]
}
}
}
Claude Desktop
Add to claude_desktop_config.json:
{
"mcpServers": {
"npm-plus": {
"command": "npx",
"args": ["mcp-server-npm-plus"]
}
}
}
VS Code
Use the MCP extension and configure the server with npx mcp-server-npm-plus.
Example Prompts
- "Search npm for React state management libraries"
- "What's the bundle size of lodash?"
- "Compare downloads of zustand vs jotai vs valtio"
- "Check for vulnerabilities in express"
- "Show me the dependency tree for next"
- "What are the download trends for typescript this month?"
Development
npm install
npm run typecheck
npm run build
npm test
npm run lint
npm run format
See also
More MCP servers and developer tools on my portfolio.
Author
README built with README Builder
License
MIT © 2026 Ofer Shapira
Comments
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