What is poly-data?
poly-data provides historical orderbook snapshots from all markets on Polymarket, collected via the Polymarket WebSocket feed since January 1, 2026. Whether you’re building arbitrage tools, conducting academic research, or backtesting trading strategies, poly-data gives you the granular market microstructure data you need.Quickstart
Get your first API response in under 2 minutes.
Why poly-data?
Complete Coverage
Every market on Polymarket, every orderbook snapshot, since day one.
Granular Data
Full bid/ask depth at each timestamp — not just mid prices.
Simple REST API
Clean endpoints with cursor-based pagination. No WebSocket complexity.
Research-Ready
Perfect for backtesting, market microstructure analysis, and academic research.
Use Cases
For Developers- Build arbitrage detection systems across prediction markets
- Create real-time alerting tools based on historical patterns
- Develop trading bots with proper backtesting capabilities
- Study market efficiency and price discovery in prediction markets
- Analyze liquidity dynamics around major events
- Research bid-ask spread behavior and market maker activity
Data Overview
| Metric | Value |
|---|---|
| Data collection start | January 1, 2026 |
| Source | Polymarket WebSocket feed |
| Coverage | All active markets |
| Orderbook depth | Full bid/ask arrays |
| Update frequency | Real-time collection |