{
  "captured_at": "2026-09-12T19:36:38.325464+00:00",
  "request_path": "/v1/spreads/crack/historical?type=diesel&crude=WTI_USD&start_date=2026-06-01&end_date=2026-09-11",
  "snapshot_window": [
    "2026-06-01",
    "2026-09-11"
  ],
  "observations": 75,
  "source": "OilPriceAPI",
  "date_basis": "reported dates; not guaranteed source publication or contract effective dates",
  "selection": "weekdays only",
  "units": "USD/barrel",
  "api_metadata": {
    "spread_type": "diesel",
    "crude_benchmark": "WTI_USD",
    "period": {
      "start": "2026-06-01",
      "end": "2026-09-11"
    },
    "coverage": {
      "from": "2026-06-01",
      "to": "2026-09-11",
      "observations": 89,
      "complete": true
    },
    "data_revised_at": "2026-09-12T00:05:41.136Z",
    "count": 89
  }
}