Warsaw Beer Overlay — Privacy Policy

Last updated: 8 July 2026

Warsaw Beer Overlay ("the extension") is a browser extension that shows, on supported craft-beer shop pages, which beers you have already drunk and your ratings, by matching the beers on the page against your personal beer history held by the Warsaw Beer Crawler bot. This policy explains what data the extension processes and where it goes. The extension is a personal, non-commercial project maintained by Yuriy Silvestrov.

What the extension processes, and why

Data	Where it goes	Why
Your access token (obtained from the bot's `/extension` command)	Stored locally in the browser (`chrome.storage.local`); sent only to the bot's API at `beer-api.ysilvestrov-ai.uk` as an authorization header	To authenticate your requests to the API
Beer and brewery names (and, when shown, ABV) read from the shop page you are viewing	Sent to `beer-api.ysilvestrov-ai.uk`	To match page beers against your history and return which you have drunk and your ratings
Match results	Cached locally in the browser only	To avoid re-requesting the same beers and to render badges quickly

Untappd enrichment (optional, off by default)

If you turn on "Find missing beers via Untappd" in the extension's options, then for beers not yet in the catalog the extension performs throttled searches (at most 20 per page) against Untappd's search service (Algolia) using your logged-in Untappd session, and sends the search results to beer-api.ysilvestrov-ai.uk so the beer can be identified. This feature requires a separate permission that you grant explicitly, and it does nothing until you enable it. To turn it off, uncheck the option; the permission can be revoked at any time from the extension's options.

Check-in sync (optional, only when you press "Sync")

The popup's "Sync my check-ins" button fetches the HTML of your own Untappd check-in feed using your logged-in Untappd session and sends it to beer-api.ysilvestrov-ai.uk, where the server records which beers you have drunk and your ratings under your account. This runs only when you press the button and grant access to untappd.com. If you never press it, no Untappd data is read.

Storage and retention

Your token and the match cache are stored locally in your browser until you remove the token, clear the cache, or uninstall the extension. Data sent to beer-api.ysilvestrov-ai.uk (matched beers and, if you use it, your check-in history) is stored server-side, tied to your bot account, and is governed by the Warsaw Beer Crawler bot; you can ask the maintainer to delete it (see Contact).

What the extension does NOT do

No analytics, telemetry, or tracking of your browsing.
No advertising and no advertising identifiers.
No selling or sharing of your data with third parties.
No network requests other than to beer-api.ysilvestrov-ai.uk and — only if you enable the optional features — Untappd and its search service (Algolia).

Your controls

Remove your token in the extension's options to stop all API requests.
"Clear all cache" in the popup removes locally cached match data.
Leave "Find missing beers via Untappd" off (or uncheck it) to disable enrichment.
Simply never press "Sync my check-ins" to avoid reading your Untappd feed.
Uninstall the extension to remove all locally stored data.

Changes to this policy

If the data the extension handles changes, this page will be updated and the "Last updated" date above changed accordingly.

Contact

Questions or data-deletion requests: yuriy@silvestrov.com.