Polymarket Market Data API: Historical Books for Developers
A developer guide to Polymarket market data APIs, including live CLOB data, historical snapshots, resolved markets, and backtesting workflows.
A Polymarket market data API can mean live CLOB data, historical snapshots, or resolved market metadata. Developers usually need different APIs for live execution and historical research.
Market Data Types
- Live order book state
- Historical order book snapshots
- Resolved market outcomes
- Reference prices for crypto event markets
- Bulk exports for offline analysis
Live API vs Historical API
| Need | Use |
|---|---|
| Place or cancel orders | Polymarket CLOB API |
| Replay past order books | PolyHistorical API |
| Backtest resolved markets | Historical snapshots plus outcomes |
| Download research dataset | Bulk export or Parquet data |