Replaying historical.flashalpha.com at an at= timestamp. Same response shape as Live.
Historical API Playground
Point-in-time replay of 52 routes - the full exposure, volatility, VRP, strategy, flow-analytics and raw-tape surface (earnings, screener and structures are live-only). Pick an endpoint, set an at timestamp, and get back exactly what lab.flashalpha.com would have returned at that minute. Same response shape as live.
Historical API is Alpha-tier only. Any request without an Alpha key returns 403 tier_restricted. Quota is shared with the live API.
at
yyyy-MM-ddTHH:mm:ss intraday, yyyy-MM-dd = 16:00 ET close.
=
Response
EXAMPLENo replay yet
Hit Replay to send the historical request
_example_note.
Replay with an Alpha key to run it yourself.
What to watch for
at (EOD snapshot); intraday near-zero-DTE greeks are sparse.null for the first ~60 trading days of any window - leak-free by design.0 on the analytics routes; it lives in the /v1/flow/* tape endpoints.at is ET wall-clock - no trailing Z, no UTC shift./v1/tickers before a backtest window.Want the full spec - data freshness, coverage table, error shapes? Read the Historical API docs →
Every route on historical.flashalpha.com is Alpha-gated. Alpha also unlocks unlimited requests, the full Live Screener, VRP analytics and SVI vol surfaces.
What you unlock with Alpha