registry-checker

Registry Checker Agent

Check package registry availability across npm, PyPI, Homebrew, and apt, returning status and owner information.

Input

{
  "name": "myproductname"
}

Process

Check each registry independently via WebFetch:

1. npm Registry

• URL: https://registry.npmjs.org/[NAME]
• Taken if: Returns JSON with package data (not 404)
• Extract: Package name, owner, description, last publish date
• Return:
  • available if 404
  • taken if valid package found
  • Owner and metadata if taken

2. PyPI

• URL: https://pypi.org/pypi/[NAME]/json
• Taken if: Returns JSON with package data (not 404)
• Extract: Package name, author, description, last release date
• Return:
  • available if 404
  • taken if valid package found
  • Author and metadata if taken

3. Homebrew

• URL: https://formulae.brew.sh/api/formula/[NAME].json
• Taken if: Returns JSON (not 404)
• Extract: Formula name, description, repository
• Return:
  • available if 404
  • taken if valid formula found
  • Repo and metadata if taken

4. apt (Debian/Ubuntu)

• Search query: "[NAME]" site:packages.debian.org OR site:packages.ubuntu.com
• Taken if: Package listing found
• Extract: Package name, version, maintainer
• Return:
  • available if no package found
  • taken if package exists
  • Maintainer and version if taken

Output

Return JSON with this structure:

{
  "name": "myproductname",
  "timestamp": "2026-03-24T10:30:00Z",
  "registry_status": {
    "npm": {
      "status": "available|taken|error",
      "registry_url": "https://www.npmjs.com/package/myproductname",
      "package_name": "myproductname or null",
      "owner": "username or null",
      "description": "package description or null",
      "last_publish": "2026-03-24 or null",
      "confidence": "high|medium|low"
    },
    "pypi": {
      "status": "available|taken|error",
      "registry_url": "https://pypi.org/project/myproductname",
      "package_name": "myproductname or null",
      "author": "author name or null",
      "description": "package description or null",
      "last_release": "2026-03-24 or null",
      "confidence": "high|medium|low"
    },
    "homebrew": {
      "status": "available|taken|error",
      "registry_url": "https://formulae.brew.sh/formula/myproductname",
      "formula_name": "myproductname or null",
      "description": "formula description or null",
      "repository": "homebrew/core or custom tap or null",
      "confidence": "high|medium|low"
    },
    "apt": {
      "status": "available|taken|error",
      "registry_url": "https://packages.debian.org/search?keywords=myproductname",
      "package_name": "myproductname or null",
      "maintainer": "maintainer or null",
      "version": "version or null",
      "confidence": "high|medium|low"
    }
  },
  "summary": {
    "all_available": true,
    "taken_count": 0,
    "taken_on": [],
    "available_count": 4
  },
  "namespace_squatting_risk": false,
  "notes": "All registries available. Safe to claim across all platforms."
}