Data sets
Overview
Polymarket market data sources, collection infrastructure, and market coverage.
Market coverage
The table below lists the earliest recorded timestamp for each market series.
| Data | Recording starts |
|---|---|
btc-5m | 2026-02-13 17:00:00 |
eth, sol, xrp-5m | 2026-02-22 03:55:00 |
doge, hype, bnb-5m, 15m, 1h | 2026-03-28 00:00:00 |
15m, 1h | 2026-01-26 08:00:00 |
chainlink | 2026-06-07 00:00:00 |
Data format
Historical data uses the same format as the real-time Polymarket WebSocket APIs, with the addition of local timestamps.
| Channel | Description | |
|---|---|---|
orderbook l2 | Incremental L2 order book data from the Polymarket WebSocket. | Download sample ↗ |
trades | Trades from the Polymarket WebSocket. | Download sample ↗ |
on-chain fills | On-chain trades from Polygon. | Download sample ↗ |
chainlink | Chainlink data, not the Polymarket proxy. | Download sample ↗ |
Data collection infrastructure
PMData's market data collection infrastructure for Polymarket is located in
AWS eu-west-2-az2 (London, Availability Zone 2).
Polymarket's exchange infrastructure is located in AWS eu-west-2 (London, Europe).
CLOB market data is captured through WebSocket connections to
wss://ws-subscriptions-clob.polymarket.com/ws/market.
Collection location history
| Period | Collection infrastructure |
|---|---|
Before 2026-07-14 | Google Cloud Platform, Madrid |
From 2026-07-14 onward | AWS eu-west-2-az2, London |