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Free Polymarket data: datasets and API

Updated October 6, 2026

Polymarket View publishes free Polymarket data under CC BY 4.0: 6 research datasets with CSV and JSON downloads (resolved markets with their prices before close, resolution times and disputes, crypto strikes, Polymarket vs Kalshi gaps, upsets) and a key-less JSON API with live odds refreshed twice a day. Credit “Polymarket View” with a link.

Research datasets

DatasetRowsPeriod coveredCollectedDownload
Resolved Polymarket markets with prices before close
Each resolved market with its price 30, 7 and 1 days before it closed and whether it happened.
1,9122025-10-02 to 2026-09-212026-10-01CSV 398 KB · JSON 823 KB
Polymarket resolution times and disputes
Scheduled end date, the time each market closed, and its UMA proposal and dispute history.
9,0982025-10-03 to 2026-10-022026-10-02CSV 1.5 MB · JSON 3.6 MB
Bitcoin and Ethereum daily price strikes
Daily “above X” strikes with the price a day before and whether the level held.
1,0082026-08-17 to 2026-09-302026-10-02CSV 30 KB · JSON 111 KB
Polymarket vs Kalshi price gaps
The same outcomes priced on both exchanges at the same time, with the gap in points.
2052026-10-062026-10-06CSV 16 KB · JSON 46 KB
Biggest Polymarket markets of all time
The 100 events with the most volume ever traded, resolved and open, with the winner and date.
1002024-07-16 to 2026-10-062026-10-06CSV 11 KB · JSON 27 KB
Long shots that won
Outcomes priced at 20% or less a week before the close that still happened.
742025-10-10 to 2026-08-242026-10-01JSON 26 KB

Each dataset has a page explaining the method and caveats. The samples are re-collected weekly; row counts and dates above are read from the files.

Live JSON API

No key, no sign-up. Refreshed twice a day from Polymarket's public data. Full documentation, OpenAPI file and examples: developer docs.

License and citation

Everything on this page is free to reuse under CC BY 4.0: credit “Polymarket View” and link to the page you used. Prices move, so keep the date: see how to cite Polymarket odds. Live numbers on your own site: embeddable odds cards.

Frequently asked questions

Where can I download Polymarket historical data?

The research datasets above are free CSV and JSON files: resolved markets with their prices 30, 7 and 1 days before the close, resolution times and disputes, crypto price strikes, Polymarket vs Kalshi gaps and upsets.

Is Polymarket data free to use?

The files and the JSON API on this site are free under CC BY 4.0: credit Polymarket View with a link. Polymarket's own website and API have their own terms.

How often is the data updated?

Live odds endpoints twice a day; the research samples weekly. Each file carries its own collection date.

Polymarket View is independent and not affiliated with Polymarket. Polymarket odds today · Guides · Developers