Deprecated: use GET /market-data/snapshot instead, which now reports the same open/high/low/volume/open-interest fields under session and top-level open_interest.

Returns the most recent open, high, low, volume (OHLV) and current price for the requested instruments.

Response contract: every request returns one row per unique resolved instrument_id, in first-seen request order. Resolvable ids with no available data come back with symbol populated but market-data fields null. Ids that fail to resolve are omitted from data and reported in error instead (see the 207/404 responses below).

{
  "error": {
    "code": 400,
    "message": "Order quantity must be greater than zero"
  },
  "metadata": {
    "page_number": 1,
    "total_items": 42,
    "total_pages": 5
  },
  "data": [
    {
      "high": "215.20",
      "instrument_id": "a1a2a3a4-b1b2-c1c2-d1d2-d3d4d5d6d7d8",
      "low": "210.10",
      "not_applicable": false,
      "open": "211.00",
      "symbol": "AAPL",
      "trade_date": "2026-04-23",
      "volume": 88000000
    }
  ]
}