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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

Problem

People meet claims while reading, not while sitting in a verification tool, and every tool in that moment wants to hand back one confident answer from one model.

Solution

The Verafy argument moved to the page. Highlight something and it goes to several models at once — each verdict, each confidence, and the sources behind them, so a claim four models split on looks visibly different from one they all agree about.

Two modes, because the cost profile differs. A quick score checks the main claims; a full read walks the whole page, highlights every claim in place and attaches cliff notes and opposing perspectives. Or select one sentence and right-click to check just that.

Analysis

It rates the source separately from the claims, and that separation is the design decision that keeps the tool usable. 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.

Result

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

The same panel is reachable directly through the Swarm Explorer.

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.