Free tools for checking and planning your stack

Check dependencies, versions and base images against today’s vulnerability and end-of-life data, plan a stack for an idea, or map a repo you already have. 17 of these 20 tools give you an answer without an account; the rest say what they need.

Check your dependencies

Live vulnerability, end-of-life and registry data for the files you already have. No AI, nothing to install.

Check a framework or runtime version

Type a version and see its open advisories, whether attackers use them, and the release that fixes them.

Plan and map a stack

Design a stack for an idea, draw the one a repo already runs on, and see what it needs before launch.

Look something up

Dated facts with their sources, for questions your coding agent can’t answer from its training data.

  • Is this npm or PyPI package version safe to install, and what replaces it if not?

    No sign-up

Use it from your coding agent

The same checks, called by Claude Code, Cursor or Codex while they work.

  • How do I give Claude Code, Cursor or Codex live stack data while they build?

    Free account