PolyOrderbooks

PolyOrderbooks

Historical Polymarket data for backtesting

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Backtest Polymarket strategies against the order book that actually existed. PolyOrderbooks provides historical L2 bid/ask depth, prices, and liquidity data through a REST API and Python SDK. Query 1-second historical snapshots, analyze spreads and depth, and model realistic fills instead of relying only on midpoint price history. Free tier available.

PolyOrderbooks

Launch date
PolyOrderbooks
PolyOrderbooksHistorical Polymarket data for backtesting

Launched on August 14th, 2026