Kalshi Eye records four venues around the clock and publishes each UTC day as Parquet files the next morning: order books, trades, settlements and the prices behind crypto markets.
Kalshi
Full L2 order books, top of book, 1-minute bars, trades, settlements and market terms for every Kalshi market. Since October 12, 2026.
Kalshi historical order book dataPolymarket
CLOB order books for both outcome tokens, trades, on-chain fills and market lists for every Polymarket market. Since October 15, 2026.
Polymarket historical order book dataLimitless
Every CLOB book update for every active Limitless market, plus the daily market list. Since October 15, 2026.
Limitless prediction market dataChainlink
Chainlink oracle prices for eight crypto assets, plus exchange spot quotes, on the same clock as the books. Since October 15, 2026.
Chainlink price history for prediction marketsThe same files for every venue
- Parquet (zstd), one file per dataset and UTC day, split by series or market for the large datasets.
- A manifest for every day with row counts, sizes and SHA-256 checksums.
- Timestamps in nanoseconds UTC: when we received each message and when the venue sent it.
- How much of every hour was recorded, per venue, is public on Data coverage.
Ways to get it
- Browse every series and its recorded days in Markets.
- Pick datasets and days in Downloads, or sync everything with aws, rclone or DuckDB.
- Call the REST API. Every column is in the data dictionary, and the plans are on Pricing.
Guides
How to backtest Kalshi markets, Kalshi vs Polymarket data, a glossary, and other data providers compared.