Historical Data Details
Overview
Historical data sources, collection start dates, and available PMData schemas.
PMData provides historical data collected from Polymarket, Polygon, and Chainlink.
Supported data sources
| Data source | Collection starts | Description |
|---|---|---|
| Polymarket | 2026-06-01 | Full-market historical data for any recorded Polymarket market. |
| Polymarket UpDown | 2026-02-01 | Optimized data for supported 5-minute, 15-minute, and 1-hour UpDown markets. |
| Chainlink Streams | 2026-06-07 | Direct Chainlink price reports, not data relayed through the Polymarket proxy. |
| Chainlink TWAP | 2026-08-01 | Direct Chainlink-computed 30-second and 60-second TWAP reports. |
Data Availability
Polymarket schemas:
- L2 — Incremental L2 order book data from the Polymarket WebSocket.
- Trades — Trades from the Polymarket WebSocket.
- On-Chain Fills — On-chain trades from Polygon.
Chainlink schemas:
- Chainlink Streams — Raw price data received from the Chainlink WebSocket stream, not the Polymarket proxy.
- Chainlink TWAP — TWAP 30s/60s data received from the Chainlink WebSocket stream.