The npm registry for AI agents
Automated package comparisons. Real-time scoring. 50+ categories. MCP server for Cursor & Claude.
- Automated Comparisons - 50+ categories with formula-based scoring
- Real-time Metrics - Downloads, bundle size, maintenance, all live
- Alternative Discovery - Find what to use instead of any package
- MCP Server - Native integration with AI coding assistants
- Sub-50ms Search - Powered by Typesense Cloud
Packages are scored automatically (0-100) based on:
| Factor | Weight | What it measures |
|---|---|---|
| Downloads | 20% | Weekly downloads + trend direction |
| Bundle Size | 20% | Smaller gzip = higher score |
| Freshness | 25% | Recent commits and releases |
| Community | 10% | Stars, contributors |
| Quality | 25% | TypeScript, ESM, security, tree-shaking |
packrun.dev/
├── apps/
│ ├── web/ # Next.js frontend
│ ├── sync/ # Data sync worker
│ └── mcp-server/ # MCP server for AI agents
├── packages/
│ ├── decisions/ # Scoring, categories, comparison engine
│ ├── agent-utils/ # Conflict detection
│ └── ui/ # Shared components
└── turbo.json
For AI coding assistants (Cursor, Claude, etc.):
Endpoint: https://mcp.packrun.dev/mcp
Configuration (for Cursor, Claude Desktop, etc.):
{
"mcpServers": {
"packrun": {
"url": "https://mcp.packrun.dev/mcp"
}
}
}Tools:
| Tool | Description |
|---|---|
search_packages |
Search npm packages |
get_package |
Get package metadata |
get_package_health |
Check maintenance status |
compare_packages |
Compare packages with scoring |
find_alternatives |
Find alternatives to any package |
get_comparison_category |
Get category comparison (e.g., "date-library") |
list_comparison_categories |
List all 50+ categories |
validate_install |
Check compatibility before installing |
# Compare specific packages
GET /api/compare?packages=axios,got,ky
# Get category comparison
GET /api/compare?category=date-library
# Find alternatives for a package
GET /api/compare?package=moment
# List all categories
GET /api/compare?list=categories{
"category": "date-library",
"recommendation": "date-fns",
"smallestBundle": "dayjs",
"mostPopular": "moment",
"packages": [
{
"name": "date-fns",
"score": 82,
"badges": ["TypeScript", "ESM", "Trending Up"],
"metrics": {
"weeklyDownloads": 20000000,
"downloadTrend": "growing",
"bundleSizeKb": "13.2kb",
"lastCommitDays": 2,
"hasTypes": true
}
},
...
]
}50+ categories including:
- HTTP clients: axios, got, ky, node-fetch
- Date libraries: moment, date-fns, dayjs, luxon
- Validation: zod, yup, joi, ajv, valibot
- State management: redux, zustand, jotai, recoil
- ORM: prisma, drizzle, typeorm, sequelize
- Testing: vitest, jest, mocha, ava
- Bundlers: vite, esbuild, webpack, rollup
- Logging: pino, winston, bunyan
- And 40+ more...
- Bun v1.2+
- Typesense Cloud account
- Redis instance
git clone https://github.com/your-org/packrun.dev
cd packrun.dev
bun installbun run dev:web # Web app on :3000
bun run dev:sync # Sync worker# Typesense
TYPESENSE_HOST=xxx.typesense.net
TYPESENSE_PORT=443
TYPESENSE_PROTOCOL=https
TYPESENSE_API_KEY=xxx
# Optional: GitHub token for higher rate limits
GITHUB_TOKEN=xxxMIT