Polymarket Historical Data
Access Polymarket historical data with order book snapshots, bid/ask depth, resolved market metadata, and API workflows for research and backtesting.
Polymarket historical data is most valuable when it includes more than headline prices. For backtesting, market research, and execution analysis, you need timestamped market states, bid and ask depth, and resolution metadata.
What Historical Data Should Include
- Resolved and historical market metadata, including slug, coin, timeframe, and outcome.
- Snapshot time series for UP and DOWN prices.
- Full bid and ask depth for realistic fill and slippage modeling.
- Reference price context for BTC, ETH, and SOL Up/Down markets.
Common Use Cases
| Use case | Why historical data matters |
|---|---|
| Backtesting | Replay past markets with the book state available at each decision point. |
| Research | Study probability movement, liquidity, spread, and settlement behavior. |
| Bot validation | Test trading logic before deploying into live markets. |
| Execution analysis | Estimate fill prices from bid and ask ladders instead of midpoint marks. |