Package Intel MCP Server

A Model Context Protocol (MCP) server for querying package registries (npm, PyPI, crates.io) to retrieve metadata about packages including versions, release cadence, and maintenance signals.

Features

• Multi-Registry Support: Query npm, PyPI, and crates.io from a single interface
• Package Summaries: Get comprehensive package metadata including version, license, and repository info
• Release Timelines: Retrieve version history with release dates
• Maintenance Signals: Analyze package health with automated scoring

Installation

npm install
npm run build

Usage

As MCP Server (stdio)

npm start

As HTTP Server

npm run start:http
# Or with custom port
PORT=8080 npm run start:http

Claude Desktop Configuration

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "package-intel": {
      "command": "node",
      "args": ["/path/to/package-intel/dist/cli.js"]
    }
  }
}

Tools

package_summary

Get summary information about a package.

Parameters:

• ecosystem (required): "npm" | "pypi" | "crates"
• name (required): Package name

Example: ``json { "ecosystem": "npm", "name": "lodash" } ``

Response: ``json { "ok": true, "data": { "name": "lodash", "version": "4.17.21", "description": "Lodash modular utilities.", "homepage": "https://lodash.com/", "repository": "https://github.com/lodash/lodash", "license": "MIT", "keywords": ["modules", "stdlib", "util"] }, "meta": { "source": "https://registry.npmjs.org/lodash", "retrieved_at": "2024-01-15T10:30:00.000Z", "pagination": { "next_cursor": null }, "warnings": [] } } ``

release_timeline

Get the release history of a package.

Parameters:

• ecosystem (required): "npm" | "pypi" | "crates"
• name (required): Package name
• limit (optional): Maximum releases to return (default: 20, max: 100)

Example: ``json { "ecosystem": "pypi", "name": "requests", "limit": 5 } ``

Response: ``json { "ok": true, "data": { "package_name": "requests", "ecosystem": "pypi", "releases": [ { "version": "2.31.0", "date": "2023-05-22T10:00:00.000Z", "is_prerelease": false }, { "version": "2.30.0", "date": "2023-05-01T10:00:00.000Z", "is_prerelease": false } ], "total_versions": 87 }, "meta": { "source": "https://pypi.org/pypi/requests/json", "retrieved_at": "2024-01-15T10:30:00.000Z", "pagination": { "next_cursor": "5" }, "warnings": [] } } ``

maintenance_signals

Analyze maintenance health signals for a package.

Parameters:

• ecosystem (required): "npm" | "pypi" | "crates"
• name (required): Package name

Example: ``json { "ecosystem": "crates", "name": "serde" } ``

Response: ``json { "ok": true, "data": { "package_name": "serde", "ecosystem": "crates", "days_since_last_release": 45, "last_release_date": "2023-12-01T10:00:00.000Z", "releases_per_year": 12.5, "total_versions": 156, "is_deprecated": false, "maintenance_score": "good", "score_factors": { "recency": "good", "frequency": "good", "maturity": "good" } }, "meta": { "source": "https://crates.io/api/v1/crates/serde", "retrieved_at": "2024-01-15T10:30:00.000Z", "pagination": { "next_cursor": null }, "warnings": [] } } ``

Maintenance Score Calculation

The maintenance score is calculated based on three factors:

Recency (50% weight)

• Good: Last release < 90 days ago
• Fair: Last release < 365 days ago
• Poor: Last release >= 365 days ago

Frequency (30% weight)

• Good: >= 4 releases per year
• Fair: >= 1 release per year
• Poor: < 1 release per year

Maturity (20% weight)

• Good: >= 10 total versions
• Fair: >= 3 total versions
• Poor: < 3 total versions

If a package is deprecated, the score is automatically set to "poor".

Error Handling

All tools return errors in a consistent envelope format:

{
  "ok": false,
  "error": {
    "code": "INVALID_INPUT",
    "message": "Package 'nonexistent' not found on npm",
    "details": {
      "package": "nonexistent",
      "ecosystem": "npm"
    }
  },
  "meta": {
    "retrieved_at": "2024-01-15T10:30:00.000Z"
  }
}

Error Codes

• INVALID_INPUT: Invalid parameters or package not found
• UPSTREAM_ERROR: Registry API returned an unexpected error
• RATE_LIMITED: Registry rate limit exceeded
• TIMEOUT: Request timed out
• PARSE_ERROR: Failed to parse registry response
• INTERNAL_ERROR: Unexpected server error

Configuration

Environment variables (see .env.example):

| Variable | Default | Description | |----------|---------|-------------| | PORT | 3000 | HTTP server port | | REQUEST_TIMEOUT | 30000 | Request timeout in ms | | USER_AGENT | package-intel/0.1.0 | User agent for registry requests | | CACHE_TTL | 300 | Cache TTL in seconds | | LOG_LEVEL | info | Log level: debug, info, warn, error |

Development

# Install dependencies
npm install

# Build
npm run build

# Run tests
npm test

# Run tests in watch mode
npm run test:watch

# Type check
npm run typecheck

# Development mode (watch)
npm run dev

License

MIT