Orderbook History fetches historical orderbook snapshots for a specific Kalshi market identified by its ticker over a specified time range. If no start and end times are provided, it returns the latest orderbook snapshot. Returns snapshots of the order book including yes/no bids and asks with prices in both cents and dollars.

Best for: Analyzing market depth on Kalshi, tracking bid/ask spread over time, building orderbook visualizations, monitoring liquidity.

Endpoint: GET /kalshi/orderbooks

Note: All timestamps are in milliseconds. Orderbook data has history starting from October 29th, 2025. When fetching the latest orderbook (without start/end times), the limit parameter is ignored.

Example

curl -X GET "https://api.aisa.one/apis/v1/kalshi/orderbooks?ticker=KXNFLGAME-25AUG16ARIDEN-ARI&start_time=1760470000000&end_time=1760480000000&limit=100" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json"

Response

The response returns a snapshots array containing orderbook snapshot objects, each with an orderbook object containing yes, no, yes_dollars, and no_dollars arrays of price-quantity pairs, along with a timestamp (in milliseconds) and ticker. A pagination object with has_more and paginationKey fields supports cursor-based pagination.