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.
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.
AnnouncementsWelcome to The Heat Sheet
Introducing a new kind of political analysis publication -- one built on calibration, transparency, and accountability.