Daily history for a contract
Daily aggregates per trading day in [startDate, endDate] — total
premium / volume, OI dynamics, bid/ask execution split, sweep
and multi-leg shares, VWAP, last price, IV, and trade count.
Authorizations
Skylit API key in the Authorization header
(Authorization: Bearer fs_live_<key>). X-API-Key is also accepted.
Path Parameters
OPRA option symbol in URL-safe form:
{ticker}__{YYMMDD}{C|P}{strike×1000, 8 digits} — the ticker and the
15-character contract block are joined by a double underscore
(__). For example, an AAPL $250 call expiring 2026-01-17 is
AAPL__260117C00250000. (A space-padded 21-char OCC form such as
AAPL 260117C00250000 is also accepted on some endpoints, but the
__ form is canonical and works across all contract routes.)
"SPY__250516C00580000"

