The game looks real.
The server tells the truth.
SlotGuard identifies where online games are really served from — and checks the source against a live database of known provider infrastructure, the moment the game loads.
Available now as a free Chrome extension.
Free · No account · No tracking
One badge. Three clear answers.
Known provider domain
The game is served from infrastructure that matches a known provider domain in our database.
Known suspicious infrastructure
The serving domain matches infrastructure previously flagged as suspicious or counterfeit. Consider not playing.
Unknown domain
The domain isn't in our database yet. Unknown doesn't mean unsafe — it means unverified. You can report it for review.
A green badge confirms the serving domain — it does not certify the casino, its licence, or payouts.
Why SlotGuard exists
Online casino games are built by game providers and embedded by casinos. In the normal case, a game is delivered from the provider's own server infrastructure, no matter which casino site embeds it.
Copies of popular games exist that look and sound identical to the original but are served from unrelated infrastructure. Such copies may potentially run altered configurations. By appearance alone, a player cannot tell the difference.
The serving domain is an observable, technical signal. SlotGuard was built to make that one signal visible to anyone — calmly, automatically, and without collecting your browsing history. It does not accuse any specific casino and does not replace regulators; it simply shows where the game comes from.
How it works
- 01
A game loads
You open a slot at any online casino.
- 02
SlotGuard inspects the source
It scans iframes on the page and observes network request hostnames — locally, in your browser.
- 03
The domain is compared
The serving domain is checked against a database of known provider and suspicious domains.
- 04
A verdict appears instantly
Green, red, or gray — on the extension icon and in the popup.
How we decide
Every verdict follows the same deterministic path. No scoring, no guesswork — a domain either matches known infrastructure or it doesn't.
iframeGame frames are detected on the page
requestNetwork request hostnames are observed
domainThe serving domain is extracted and normalized
databaseIt is matched against known provider infrastructure
verdictMatch → green · flagged → red · no match → gray
Suspicious-list matches take priority over provider matches. Matching happens on exact domain boundaries — lookalike domains do not pass.
Why domain verification matters
A pixel-perfect copy can load from anywhere. A game can look identical to the original and still be served from infrastructure unrelated to the stated provider.
Visual inspection cannot reveal this — the serving domain can. That is the signal SlotGuard checks. It does not guarantee outcomes; it verifies the source.
Designed with data minimization in mind
- No browsing history is stored.
- Domain checks run locally in your browser.
- Only when you explicitly report a domain, the game domain and the casino origin — without paths, query strings, or tokens — are submitted.
- Temporary tab state lives in session storage and clears when the browser closes.
- No accounts. No ads. No sale of personal information.
Dozens of known provider domains. Updated live.
The database updates without reinstalling the extension. A built-in fallback keeps SlotGuard working even if the live database is unreachable.
Frequently asked questions
What does a green badge mean?
The game is being served from a domain that matches known provider infrastructure in the SlotGuard database. It verifies the source of the game files — nothing more.
Does green mean the casino is completely safe?
No. A green badge confirms the serving domain only. It does not certify the casino's licence, fairness, or payouts. Always do your own due diligence.
Does SlotGuard collect my browsing history?
No. Checks run locally. Data leaves your browser only when you explicitly report a domain — and even then, only the game domain and the sanitized casino origin.
Why does the extension need access to websites?
To see which domains serve game content, SlotGuard must observe iframes and network requests on casino pages. That access is used for domain matching only.
Check the server before you play.
Get SlotGuard — free, no account required.
Available now on Chrome. More platforms are on the roadmap. View the roadmap →