npm‑dep‑chain is a Node.js library that remotely traverses the NPM registry to retrieve the full dependency tree (including all sub‑dependencies) for one or more packages without needing them installed locally. It’s aimed at developers and tool‑makers who need to analyze, replicate, or audit package ecosystems—e.g., for private registry mirroring, license or author statistics, or creating “npm ls”‑style reports.