UTC date to retrieve, formatted as YYYY-MM-DD. Orderbook data exists for a subset of Kalshi markets from 2026-02-17, but coverage is not continuous. Continuous Kalshi crypto-related market coverage begins on 2026-02-25, and continuous coverage for all Kalshi markets begins on 2026-03-31.
Array of raw Kalshi records, typically snapshots and deltas. Record shapes vary by source event type and may include fields like type, timestamp, epoch_ms, seq, yes, and no.