OddsPapi

OddsPapi is a real-time sports betting odds API that aggregates pre-match, live, and historical odds from 300+ bookmakers across 60+ sports and 12,000+ competitions per year. It's built for developers creating odds comparison platforms, sportsbook and trading tools, prediction and machine-learning models, arbitrage and value-betting screeners, and fantasy/prop analytics.

The API delivers normalized data through a REST interface with JSON responses and a low-latency WebSocket feed for streaming line movement. Every sport, league, market, and outcome is mapped to consistent IDs, so data stays clean across bookmakers and is ready for ingestion, comparison, and model training without per-book reconciliation. Coverage spans the major US and global books — Pinnacle, Bet365, DraftKings, FanDuel, BetMGM, Caesars, BetRivers, Circa, and more — across markets including moneyline, spread, totals, 1X2, draw no bet, Asian handicaps, futures, and player and team props.

OddsPapi also offers free historical odds so teams can backtest models, validate data quality over time, and train on real line history at no cost. With a free tier, straightforward developer-friendly pricing, and no vendor lock-in, it's positioned as a faster, broader-coverage alternative to providers like The Odds API, SportsDataIO, and Sportradar.