Historical Prediction Market Data
488K+ resolved contracts with settlement outcomes across Kalshi and Polymarket. Full calibration analysis and price history.
Resolved Contracts
Total resolved
488,000+
Venues
Kalshi + Polymarket
Date range
2021 — present
Update frequency
Weekly
Calibration
Brier scores computed across categories, venues, and time horizons. Use this to evaluate how well prediction markets forecast outcomes.
View calibration analysis →Price History API
7-day price history available for all active markets via API.
GET /api/public/market/{ticker}/history
Response: [{ timestamp, price, volume }, ...]