Free Add-on Update Notifier 1.0.0

Free Add-on Update Notifier tells you when your installed add-ons have updates, by reading each add-on's latest version straight from its own xenforo.com resource page. No API key, no third-party server, no add-on limit, and nothing about your site or your installed add-ons is ever sent anywhere.

Perfect for anyone who runs more than a handful of add-ons and is tired of finding out about updates by accident, or of paying for a notifier that caps how many add-ons it will watch.

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• Free and unlimited - watches every installed add-on, with no per-add-on cap and no paid tier.
• No third-party server - reads the latest version directly from each add-on's public xenforo.com resource page. The only outbound traffic is a normal HTTPS request to xenforo.com.
• Control panel home notice - a native block listing each add-on with an update ("you have X, latest is Y"), a "View on XenForo.com" link, and a "Check now" button.
• Add-ons page summary - the same update summary at the top of Admin CP > Add-ons, with a per-add-on "Re-check".
• Active email alerts - administrators are emailed when a new update is found, de-duplicated so you are not re-emailed about the same version. Can be turned off.
• Scheduled and on-demand checks - a daily task with a configurable minimum interval, plus a global "Check now" and an instant per-add-on "Re-check".
• Wider detection - finds the resource link in dev_url, support_url, faq_url, or any extra_urls entry, so it tracks add-ons a registry-based tool can miss.
• Coverage transparency - the notice shows how many of your installed add-ons are being checked, so you know your blind spots.
• Native styling - the notice and summary render with XenForo's own row layout, so they look like a built-in feature.
• Privacy and safety by design - HTTPS only, time-limited and rate-limited requests, response size capped, redirects pinned to xenforo.com, and an honest "last checked" time that is not advanced when xenforo.com cannot be reached.
• Clean uninstall - no database tables; all cached state and the cron entry are removed on uninstall.

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For every installed, active, non-legacy add-on, the notifier looks in its addon.json for a xenforo.com resource URL, requests that resource page, and reads the latest version from the page's structured data (JSON-LD). It compares that to the version you have installed and surfaces anything newer on the control panel home and the Add-ons page, optionally emailing your administrators. Add-ons without a xenforo.com resource are simply skipped, and the coverage line tells you how many that is.

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Admin CP > Setup > Options > Free Add-on Update Notifier

• Show the update notice on the admin home
• Show updates on the Add-ons page
• Check for updates automatically
• Minimum days between automatic checks
• Email admins when updates are found

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• Storage: No database tables. State (available updates, last-check time, alert de-dup, and a cached coverage count) lives in XenForo's SimpleCache.
• Performance: Zero database queries and zero outbound HTTP on page render - all network activity is confined to the background scheduled task, which is rate-limited (250ms between add-ons), bounded (streamed response with a hard size cap), 10-second timeout, and frequency-gated so it only scans when due.
• Footprint: One cron entry, two class extensions (the admin Index and Add-on controllers), two template modifications, and one email template.
• Compatibility: XenForo 2.3.x.
• Code Quality: PHPStan level 3 clean. 24 automated browser tests, full coverage. All input filtered, CSRF protection on all forms, SSRF-hardened (redirects pinned to xenforo.com, bounded reads).