Polymarket Historical Data: Complete Guide to Free Order Book History
Everything you need to know about accessing Polymarket historical data for free — order book snapshots, API access, and downloadable datasets from PolyHistorical.
If you're looking for Polymarket historical data, you've come to the right place. PolyHistorical is the only platform that gives you complete, historical order book data from Polymarket prediction markets — and you can start using it completely free.
What Polymarket Historical Data Is Available?
PolyHistorical archives every order book snapshot from Polymarket's BTC, ETH, and SOL Up/Down prediction markets. This includes:
- Full bid and ask depth — not just top-of-book, but the entire order book at every level
- Sub-second resolution — snapshots captured at sub-second intervals
- Multiple timeframes — 5-minute, 15-minute, 1-hour, 4-hour, and 24-hour markets
- Growing historical archive — enough data to build and validate serious trading strategies
Why Use PolyHistorical for Polymarket Historical Data?
Polymarket itself does not offer a historical data API. Once a market resolves, the order book data is gone. PolyHistorical solves this by continuously recording every snapshot so you can access it anytime — for research, backtesting, or building trading algorithms.
- Free Starter tier — access recent BTC market history with no credit card, no trial period
- REST API — clean, well-documented endpoints you can query from Python, JavaScript, or any language
- Full order book depth — use
include_orderbook=trueto get complete bid/ask ladders - Sub-second granularity — the highest resolution Polymarket data available anywhere
API Endpoints
| Endpoint | Description |
|---|---|
GET /v1/markets | List markets filtered by coin, type, and resolution status |
GET /v1/markets/{slug} | Get details for a single market |
GET /v1/markets/{slug}/snapshots | Fetch time-series snapshots with optional order book depth |
GET /v1/markets/by-market-id/{id}/snapshots | Fetch snapshots using Polymarket market ID |
How to Get Started
- Sign up for free at PolyHistorical — no credit card required
- Get your API key from the dashboard
- Start querying historical order book data immediately via the
X-API-Keyheader
Whether you're a quant researcher, a prediction market trader, or a developer building tools — PolyHistorical gives you the Polymarket historical data you need, for free.