#npm

A Semantic Versioning (SemVer 2.0.0) toolkit as an API. Parse a version string into its major, minor, patch, prerelease and build parts; compare two versions; test whether a version satisfies an npm-style range (^1.2.3, ~1.4, >=2 <3, 1.x); increment a version to the next major, minor, patch or prerelease; and filter a list of versions by a range to find which match and the highest and lowest satisfying. Powered by the canonical node-semver. Perfect for dependency and release tooling, CI gates, update checkers, compatibility rules and package dashboards. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 6 endpoints. Distinct from package-registry lookups and vulnerability databases.

api.oanor.com/semver-api

How popular is that npm package? Get download counts and trends for any npm package straight from npm's public download API. Pull the total downloads over a period (last day, week, month, year or any custom YYYY-MM-DD:YYYY-MM-DD range), the full per-day download time series, the monthly totals over the last year to spot growth or decline, and compare several packages side by side ranked by downloads (up to 128 at once, scoped @org/name packages supported). Every call is live (no cache). 5 endpoints. Built for popularity dashboards, package-comparison pages, trend charts, dependency-health scoring and "which library won" analyses. Distinct from an npm registry-metadata lookup — this is the download time series. No upstream key, no cache.

api.oanor.com/npmstats-api

How big is that npm package? Get the minified and gzipped bundle size of any npm package — plus its dependency count, the size contributed by each dependency, peer dependencies, whether it ships an ES module and whether it is side-effect-free — in a single call. Pin a version ([email protected]) or get the latest, and pull the bundle size across a package's recent versions to spot regressions over time. Powered by the public Bundlephobia service; results are live (no cache). 3 endpoints. Built for frontend performance budgets, bundle-size CI checks, "cost of adding this dependency" tooling, and dependency dashboards. Distinct from a plain npm registry lookup (metadata) or a dependency-graph service — this measures actual shipped bytes. No upstream key, no cache.

api.oanor.com/bundlephobia-api

Everything about npm packages in one clean API. Look up a package’s latest metadata — version, description, license, homepage, repository, author, keywords, dist-tags, dependencies and maintainers — list its full version history with release dates, pull download statistics for the last day, week, month or year, and search the registry across more than three million packages. Sourced live from the public npm registry and returned as tidy JSON through a fast, reliable API. Ideal for developer dashboards and tooling, package and dependency analytics, supply-chain and security checks, CI/CD and documentation sites.

api.oanor.com/npm-api