15-minute price & orderbook snapshots across 18,400+ Polymarket prediction markets, over 76+ trading days. Clean CSV, ready for backtesting and ML. Built and maintained by the Protodex team.
Every 15 minutes we snapshot the live Polymarket order book and mid price for thousands of active prediction markets. The result is a dense, gap-checked time series you can replay candle-by-candle — not a one-off scrape. Each row carries the market question, the outcome side, mid price, best bid and ask, bid/ask depth, the spread, and a UTC timestamp.
This is the raw material for backtesting prediction-market strategies, training models on real order-flow and price dynamics, calibrating election and event forecasts against realized outcomes, and academic or quant research where clean prediction-market history is otherwise hard to source. If you have been trying to pull this from the Polymarket API yourself, this is months of collection already done, deduplicated and aligned.
market question, outcome (Yes/No), mid price, best bid, best ask, bid depth, ask depth, spread, timestamp (UTC, 15-minute interval). Plain CSV — opens in pandas, Excel, DuckDB, or anything that reads a comma.
Full dataset — $19 one-time. The complete 18.5M-snapshot history as it stands today, delivered as CSV. Best for a single backtest, a research project, or a model training run. Get the dataset →
Weekly auto-refresh feed — $19/month. The same dataset, refreshed and re-delivered every week so your models and dashboards stay current — you never scrape or re-download. Best for teams running live backtests or continuously training on fresh prediction-market data. Subscribe to the feed →
What format is it? CSV (UTF-8), one row per market-outcome per 15-minute snapshot.
How fresh is the data? The one-time dataset is current as of purchase; the weekly auto-refresh feed updates every week.
Can I use it commercially? Yes — for backtesting, research, and model training. Redistribution of the raw dataset is not permitted.
How is it collected? 15-minute price and order-book snapshots via the Polymarket CLOB API, deduplicated and time-aligned.
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