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Rex St. John
extensionlive

Verafy FactCheck Extension

Checks a claim where you are reading it and returns a panel of model verdicts with their sources, rather than one confident answer from one model.

Chrome Extension / Claude API / OpenRouter

Demo

Same argument as the rest of Verafy, moved to where people actually encounter claims. Highlight something on a page and it goes to several models at once. You get each verdict, each confidence, and the sources behind them — so a claim that four models split on looks visibly different from one they all agree about.

There are two modes, because the cost profile is different. A quick score checks only the main claims. A full read walks the whole page, highlights every claim in place, and attaches cliff notes and opposing perspectives to each one — on a long article that is a minute of work and a lot of calls. You can also skip both, select one sentence, and right-click to check just that.

It also rates the source separately from the claims, which matters: a reliable outlet can still carry a weak claim, and collapsing those two judgements into one number is how fact-checking tools end up arguing about politics instead of evidence.

Built in about thirty minutes. The first version of this idea took days.

Screens

  • The extension's side panel open beside a news article, showing a source card for the outlet, a score out of 100 reading "Mostly supported", a row of per-claim chips colored by verdict, and a progress line reading 11 of 12 claims checked
    A full read of a news page. Every claim gets its own chip and its own verdict, so a piece that is mostly supported but has two weak links looks different from one that is solid throughout.