概要 — Quanteta Package Index

What this is — and what it is not

Quanteta Package Index is a database of software packages (libraries) published on three public registries: npm (JavaScript), PyPI (Python) and crates.io (Rust). For each package it reproduces the registry's own values — latest version, weekly downloads, declared license, direct dependency count, release history — and links them so you can search, filter and compare across ecosystems.

This is not a "package manager." npm, pip and cargo are the tools that install packages. This site does not install anything; it is a reference database about the packages those tools publish and distribute. We index them; we are not them.

Two kinds of numbers on this site

Official registry values

Version, weekly downloads, license, dependency count, release count and last-release date are reproduced verbatim from the registry, with the source named on every value. We do not alter them.

Quanteta-computed indices

Q-Vitality, Q-Trust and Q-Risk are indices that we compute from those official values. They are clearly labelled as Quanteta-computed (not measured), their exact formula is published on the データと出典 page, and they are never presented as if a registry produced them.

Data sources

npm

npm Registry — package metadata, versions and weekly downloads.

PyPI

PyPI (Python Package Index) — package metadata, versions and downloads (via pypistats).

crates.io

crates.io (Rust) — crate metadata, versions and downloads.

GitHub

GitHub — repository stars where a package links to a GitHub repository.

データアクセス

• Browse, search and filter all packages on this website
• Group by ecosystem, download volume and license
• Download the full dataset as CSV
• Schema.org Dataset / ItemList / SoftwareSourceCode markup for machine consumption

Quanteta's structuring and presentation is published under CC BY 4.0. Underlying source data remains governed by each source's terms.