Adjacent
Market indices
Prediction-market indices and reference rates.
Polymarket API Alternatives (2026)
Compare the top 5 platforms similar to Polymarket API. Match on features, US legality, and crypto support to find the right fit for your trading style.
Ranked by shared features with Polymarket API. Last updated November 2026.
Betfair Exchange API & Data
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Betfair exchange APIs and historical data.
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Sports odds research across prediction markets.
Bitquery Prediction Market API
API documentation
Onchain market data API documentation.
CCXT Prediction Markets
Developer library
A shared API for prediction-market data and trading.
About Polymarket API
The Polymarket API provides event and market discovery, outcome prices and order-book data for research, dashboards and trading applications. Public market-data access is separate from authenticated order placement; international and US venue support differ.
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