v1
latestOpenAPI 3.1.02026-07-2655154175.6 KBUnderlying
Option chain snapshot
Snapshot of the option chain for a single expiration on the requested date — call & put volume, premium, OI, last IV, and last trade price per strike, plus the underlying price.
get/v1/underlying/{ticker}/chain
Path parameters
tickerstring required
Example:SPY
Underlying ticker symbol (uppercase, e.g. SPY, AAPL).
Query parameters
expirationstring date required
Example:2026-08-21
Expiration date (YYYY-MM-DD).
min_volumeinteger
Suppress strikes whose total (call+put) volume is below this floor.
datestring date
Example:2026-05-27
Trading date the request targets, in YYYY-MM-DD. Defaults to the current trading date (the most recent session that has settled enough data to be queryable). Past dates fall through to the daily rollup tables.
Response
Chain snapshot.
Example response
{
"meta": {
"requestId": "d7574836"
}
}