Open VSX Registry

Development

open-vsx.org

The Eclipse Foundation's vendor-neutral open-source registry of VS Code extensions: search extensions, read one extension's metadata, fetch a pinned version record and read its reviews.

Runs on your machine under the source's own terms

The crw MCP on your computer calls Open VSX Registry directly. Calls cost no credits and the data does not pass through fastCRW. Install it once for Claude Code, Cursor, Codex, Windsurf, Gemini CLI or OpenCode, with your fastCRW API key in place of the placeholder:

Read the docs

Capabilities (4)

openvsx/extensionFree, runs locally

Returns one extension's full registry record: display name, description, all published versions, latest version, files, repository, licence, categories, download count and ratings.

namespaceextension

openvsx/extension-versionFree, runs locally

Returns the registry record for one specific published version of an extension, including its files, engines, dependencies and licence.

namespaceextensionversion

openvsx/reviewsFree, runs locally

Returns the reviews posted for an extension with rating, comment, user, timestamp and the review URLs, plus the average rating.

namespaceextension

openvsx/searchFree, runs locally

Searches the Open VSX registry and returns matching extensions with namespace, name, display name, description, version, download count, average rating and timestamp.

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Licence

If you integrate the Open VSX Registry directly into your own product, platform, CI system, or internal tooling, consider Open VSX Managed Registry to ensure the service levels and reliability your team and customers depend on.

https://managed.open-vsx.org/faqs

Attribution

Display this wherever you show the data. It arrives on every response as provenance.attributionText.

Source: Open VSX Registry, Eclipse Foundation. Extension packages remain under the licence declared by their publisher.

Read the docs Back to the catalog