Leading Prediction MarketAPI
Live data from Polymarket, Kalshi and more platforms, unified with 80+ sportsbook odds in a single API call.
Unified Prediction Market Data
From Polymarket contract prices to Pinnacle sharp lines, normalised, matched, and ready to query in a single request.
Live Contract Data
Real-time data from Polymarket, Kalshi, Novig & more
Cross-Platform Matching
Prediction market contracts mapped to their equivalent sportsbook events automatically
Fair Odds & Consensus
Algorithmically derived benchmarks to validate prediction market prices against sharp book lines
Why Combine Prediction Markets with Sportsbook Odds?
Prediction markets and sportsbooks try to price the same events using fundamentally different mechanisms, and that creates opportunity.
Sportsbooks function like a house dealer. They set fixed lines, absorb risk, and bake in a margin. Prediction markets function more like a financial exchange, where prices move based on order flow and can diverge significantly from sportsbook consensus.
When the two systems disagree, there is signal. The SportsGameOdds API gives you both sides of the picture in a single API call, pre-normalized and ready to compare.
Choose Your Plan
Start free and scale as you grow.
Covered Prediction Market Platforms
As of 2026, the US prediction market landscape has expanded rapidly. Major brands including DraftKings, FanDuel, and Fanatics, have all launched their own prediction market products, joining established players like Kalshi and Polymarket. SportsGameOdds aggregates data across all major platforms so you never need to integrate them individually.
What Can You Build with a Prediction Markets API?
Arbitrage and Cross-Market Analysis Tools
Compare prediction market implied probabilities against sportsbook odds in real time. Identify pricing discrepancies across Polymarket, Kalshi, DraftKings Predictions, and 80+ books in a single API call, with no need to juggle multiple authentication schemes or data formats.
Research and Forecasting Platforms
Prediction markets are increasingly cited as accurate leading indicators for real-world events. Aggregate contract prices alongside traditional market data for academic research, journalism tools, or public forecasting dashboards.
Odds Aggregators and Comparison Sites
Show users the full picture with sportsbook lines and prediction market probabilities side by side. Give bettors and traders a richer data set to inform their decisions.
Algorithmic Trading Systems
Use normalized historical data to backtest strategies that exploit the spread between sportsbook consensus and prediction market prices. Combine with sharp book lines from providers like Pinnacle as a benchmark for identifying mispriced contracts.
Sports Media and Content Products
Embed real-time prediction market probabilities alongside traditional odds widgets in editorial content. Prediction market prices are often more intuitive to a general audience since 72% chance reads exactly as you would expect, unlike American odds formats.
AI and ML Models
Feed normalized prediction market data into machine learning models alongside sportsbook line movement, public betting percentages, and historical outcomes. The cross-platform data set unlocks signal that is simply unavailable from any single source.
Why SportsGameOdds for Prediction Market Data?
One API, Every Market Type
Most prediction market APIs give you one platform. SportsGameOdds gives you Polymarket, Kalshi, DraftKings Predictions, FanDuel Predicts, Fanatics Markets, Robinhood, Novig, ForecastEx, and more, all through a single endpoint with a unified schema. No separate authentication flows. No manual normalization across ten different API contracts.
No Blockchain Complexity
Accessing Polymarket data natively requires managing wallet credentials, EIP-712 signed orders, and Polygon blockchain interactions. SportsGameOdds handles all of that for you. You get clean REST responses with no crypto infrastructure required on your end.
Already Normalized with Sportsbook Data
Prediction market prices live in implied probability ranging from $0.00 to $1.00. Sportsbook odds live in American or decimal format. SportsGameOdds normalizes everything into a consistent schema, so you can compare a Polymarket contract directly against a Pinnacle line without writing any conversion logic yourself.
Real-Time Updates and WebSocket Streaming
Prediction market prices move continuously. SportsGameOdds provides sub-minute update frequencies on paid plans and WebSocket streaming for applications that need to react to price changes the moment they happen.
Historical Data for Backtesting
Access historical prediction market prices alongside sportsbook lines from previous seasons. This is critical for building and validating quantitative strategies before putting real capital behind them. \
Start Building Today
Free plan available. Set up in 5 minutes. Scale when you're ready.