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Kalshi Historical Market Data API
Access Kalshi event market data through a unified API. Kwery normalizes Kalshi order books, OHLCV, and market metadata alongside Polymarket and Binance so you can build cross-venue strategies and backtests without maintaining multiple integrations.
What you get
- Kalshi event markets for BTC, ETH, SOL
- Order book and OHLCV at 5m–24h
- Snapshot-at-timestamp for backtesting
- Same REST API as Polymarket and Binance
- Pro plan: 6 months history, order book on snapshots
Sample request & response
GET /v1/kalshi/candles?symbol=BTC&interval=1h&limit=24
{
"symbol": "BTC",
"source": "kalshi",
"interval": "1h",
"candles": [{
"time": "2026-03-04T14:00:00Z",
"open": 0.52,
"high": 0.54,
"low": 0.51,
"close": 0.53,
"volume": 125000
}],
"total": 24
}Get Kalshi data via Kwery
Free tier includes 14 days history. Upgrade for 6 months or full history.