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GET
Get Kalshi Orderbooks
Fetch historical orderbook snapshots for a Kalshi market. Data starts from January 7th, 2026.
This endpoint will be deprecated soon. Kalshi prices markets in sub-cent increments; this endpoint rounds prices to whole cents, which widens spreads and merges neighboring price levels. Use the Sub-Cent Orderbook History endpoint instead. The deprecation date will be announced in the changelog.
Free & Unlimited. This endpoint does not count toward your monthly usage limits on any plan.
Timestamps are in milliseconds. Prices are in cents (1–99).

Authorizations

x-api-key
string
header
required

Query Parameters

ticker
string
required

The Kalshi market ticker

start_time
integer
required

Start time in Unix timestamp (milliseconds)

end_time
integer
required

End time in Unix timestamp (milliseconds)

limit
integer
default:100

Maximum number of snapshots to return

Required range: 1 <= x <= 2000
pagination_key
string | null

Pagination key to get the next chunk of data

Response

Successful Response

Kalshi orderbooks endpoint response.

snapshots
KalshiOrderbookSnapshot · object[]
required
pagination
CursorPagination · object
required

Cursor-based pagination for endpoints that don't support offset.