Chrome Extension Version API

Lightweight HTTP API that checks published Chrome extension versions from Chrome Web Store.

Endpoint

GET /check-published-extension-version/{extensionId}

Response (200 OK)

{
  "version": "1.23.4",
  "cached": false,
  "checkedAt": "2026-03-16T12:00:00Z"
}

Error responses

• 400 - Invalid extension ID format
• 404 - Version could not be extracted
• 503 - Chrome Web Store unreachable or rate limited (JSON body with "source": "chrome-extension-version-api" to distinguish from nginx 503)

Configuration

Env Variable	Default	Description
CacheTtlMinutes	5	How long to cache version checks
ASPNETCORE_URLS	http://+:8080	Listen address

Docker

docker build -t chrome-extension-version-api .
docker run -p 8080:8080 chrome-extension-version-api