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ALPHA TIER HISTORICAL

Historical Stock Quote API

Stock bid / ask / mid / last at any minute since 2018. The underlying spot reference for every other historical analytics call. Same shape as live /v1/stockquote.

Coverage
2018-04-16 → 2026-04-02
Granularity
1 minute
Tier
Alpha+
Format
JSON (REST)

Endpoint

GET/v1/stockquote/{ticker}?at=...
Host: historical.flashalpha.comAuth: X-Api-KeyTier: Alpha
curl -H "X-Api-Key: YOUR_API_KEY" \
  "https://historical.flashalpha.com/v1/stockquote/SPY?at=2026-03-05T15:30:00"

Response

{
  "ticker": "SPY",
  "bid": 679.45,
  "ask": 679.47,
  "mid": 679.46,
  "lastPrice": 679.46,
  "lastUpdate": "2026-03-05T15:30:00"
}

What This Unlocks

  • Backtest event timing — compute returns at any specific minute against historical spot.
  • Validate options-payoff scenarios against the actual underlying path.
  • Build minute-bar studies over 8+ years without licensing a separate stock-tick feed.