Open Source Package Registry Inspector Guide
Inspect release versions, dependencies, license compliance, and sizes across npm, PyPI, and Crates.io.
Overview
Inspect software package health and metadata across npm (JavaScript), PyPI (Python), and Crates.io (Rust). Verify latest releases, declared licenses, dependency counts, author contacts, and repository links.
When to Use Open Source Package Registry Inspector
Use Open Source Package Registry Inspector when evaluating third-party dependencies, conducting license compliance audits, or checking release versions.
Inputs, Formats & Specifications
- Accepted Inputs
- Ecosystem selector (npm, PyPI, Crates.io), Package Name string
- Output Formats
- Latest version, description, declared license, repository URL, maintainers, direct dependencies, publication date
- Supported Standards
- npm Registry JSON, PyPI JSON API, Crates.io API v1
- Browser Limits & Scope
- Inspects public, published open-source packages; private corporate registries (private npm/Artifactory) are not queried.
How to use Open Source Package Registry Inspector
- Select your target software ecosystem: npm (JavaScript), PyPI (Python), or Crates.io (Rust).
- Enter the package name (e.g. `express`, `requests`, or `serde`) into the search field.
- Click 'Inspect Package' to query official public registry APIs directly from your browser.
- Review the package summary card showing latest version, declared license, author contacts, and repository links.
Real-World Examples
Frequently Asked Questions
Which package registries are supported?
This inspector queries npm (JavaScript/TypeScript), PyPI (Python Package Index), and Crates.io (Rust) via their official public APIs.
Does this require an npm or GitHub token?
No. All queries inspect public, unauthenticated registry metadata using direct HTTPS requests.
How does it detect license compliance?
It reads the standardized `license` field in the package manifest (e.g. SPDX license identifiers like MIT, Apache-2.0, BSD-3-Clause).
Privacy & Data Security
Open Source Package Registry Inspector queries verified public open data directly from your browser with zero tracking and zero API keys.