Adjacent
Market indices
Prediction-market indices and reference rates.
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Market indices
Prediction-market indices and reference rates.
Developer resources
Betfair exchange APIs and historical data.
Research only
Sports odds research across prediction markets.
API documentation
Onchain market data API documentation.
Developer library
A shared API for prediction-market data and trading.
The Kalshi API provides public event, market and order-book data for prediction-market research and application development. Public market-data requests do not require authentication; trading and private account endpoints require credentials.
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