packrun.dev

The npm registry for AI agents

Automated package comparisons. Real-time scoring. 50+ categories. MCP server for Cursor & Claude.

Features

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

How Scoring Works

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 |

Project Structure

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

MCP Server

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 |

API

Compare Packages

# 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

Response Example

{
  "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
      }
    },
    ...
  ]
}

Getting Started

Prerequisites

Bun v1.2+
Typesense Cloud account
Redis instance

Installation

git clone https://github.com/your-org/packrun.dev
cd packrun.dev
bun install

Development

bun run dev:web    # Web app on :3000
bun run dev:sync   # Sync worker

Environment Variables

# 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=xxx

License

MIT

Packrun

Install / Use

README