Polymarket Historical Data API or Dataset: Which Should You Use?
Should you use the Polymarket historical data API or download a static dataset? Compare both approaches with PolyHistorical for your research and trading needs.
When working with Polymarket historical data, you have two main approaches: use the live API or download a static dataset. Both are available for free on PolyHistorical. Here's how to choose.
Option 1: The API
Best for: ongoing research, automated pipelines, and always-fresh data.
- Always up to date — every new snapshot is available immediately
- Query exactly the date range and market you need
- Integrate directly into your code — no file management
- Perfect for CI/CD pipelines that re-run backtests on fresh data
Option 2: Static Dataset Download
Best for: one-time analysis, academic papers, and offline environments.
- Download once, work offline forever — no internet dependency
- Faster iteration when repeatedly processing the same data
- Easy to share with collaborators as a file
- Ideal for Jupyter notebooks and exploratory research
Side-by-Side Comparison
| Factor | API | Dataset Download |
|---|---|---|
| Freshness | Always current | Snapshot in time |
| Setup effort | API key + HTTP call | Download + load file |
| Speed (repeated use) | Network latency each call | Instant (local disk) |
| Best for | Automated, ongoing | One-off research |
| Cost | Free tier available | Free tier available |
Our Recommendation
Start with the API for flexibility. If you find yourself querying the same date range repeatedly, download that range as a dataset for faster local access. Both approaches are free on PolyHistorical and use the same underlying data.