Explore npm, PyPI, Maven Central, and crates.io packages directly from GitHub Copilot Chat
Features
Universal search — search packages across npm, PyPI, Maven Central, and crates.io simultaneously
Cross-registry alternatives — find the PyPI equivalent of an npm package, or the Rust equivalent of a Java library
Version explorer — list versions, get details, compare two versions with dependency diffs
Dependency analysis — view runtime/dev dependencies and reverse-dependents
Health & security — download stats, health scores, and CVE advisories via OSV.dev
Auto-registration — appears in the VS Code MCP Servers panel immediately after install
Settings UI — configure registries, npm token, timeout, and cache TTL via VS Code settings
Getting Started
Install the extension (VSIX from Releases or the Marketplace)
Open the MCP Servers panel in VS Code
Click Start next to RegistryX
Open GitHub Copilot Chat and start exploring packages
Settings
Setting
Default
Description
registryx.registries
npm,pypi,maven,crates
Enabled registries (comma-separated)
registryx.npmToken
(empty)
npm auth token for private packages
registryx.timeoutMs
15000
HTTP request timeout in milliseconds
registryx.cacheTtlMs
300000
Cache TTL in milliseconds (0 to disable)
Example Prompts
Search for JSON schema validation libraries across all registries
What are the top alternatives to express.js in other languages?
Show me the latest stable versions of serde with a release history
Compare lodash v4.17.20 and v4.17.21 — what dependencies changed?
Does log4j 2.14.1 have any known security vulnerabilities?
What packages depend on react?
Get the health score and maintenance signals for requests (PyPI)
Tools
Tool
What it does
registryx_search
Search packages by name/keyword across registries
registryx_search_alternatives
Find cross-ecosystem equivalents
registryx_get_package
Package metadata, license, homepage
registryx_get_readme
README content
registryx_get_maintainers
Authors and maintainers
registryx_list_versions
Version history with pre-release filter
registryx_get_version
Specific version details
registryx_compare_versions
Side-by-side version diff
registryx_get_dependencies
Runtime/dev dependencies
registryx_reverse_dependencies
Who depends on this package
registryx_download_stats
Download counts by time period
registryx_package_health
Health score and signals
registryx_security_advisories
CVEs via OSV.dev
Supported Registries
Registry
Search
Package
Versions
Deps
Reverse Deps
Stats
Security
npm
✅
✅
✅
✅
✅
✅
✅
PyPI
✅
✅
✅
✅
—
—
✅
Maven Central
✅
✅
✅
—
—
—
✅
crates.io
✅
✅
✅
✅
✅
✅
✅
Troubleshooting
Server doesn't appear in MCP panel:
Ensure VS Code 1.99 or later
Run Developer: Reload Window and check the MCP Servers panel
"Registry not enabled" error:
Check registryx.registries in Settings — the registry must be in the list
Private npm packages not found:
Set registryx.npmToken to your npm access token in VS Code settings
