The SpreadThe Market Grades API
Our daily prediction market grades are now available as a free, public JSON API. Filter by chamber, state, grade, or rating -- from the terminal or your own code.
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The Spread
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The Spread
The SpreadYour Local Market
Not all prediction markets are created equal. We grade every House, Senate, and gubernatorial market daily on volume, spreads, and open interest -- so you know which prices to trust.