curl -X GET \
  -H "x-api-key: $OMNI_DATASTREAM_API_KEY" \
  -H "omni-version: 2026-03-19" \
  "https://api.secapi.ai/v1/market/indices/constituents?index=NDX&limit=2"

{
  "object": "list",
  "data": [
    {
      "object": "index_constituent",
      "id": "idxc_ndx_aapl",
      "createdAt": "2026-03-18T16:00:00.000Z",
      "livemode": false,
      "indexCode": "NDX",
      "indexName": "Nasdaq-100 Index",
      "entityId": "ent_aapl",
      "ticker": "AAPL",
      "cik": "0000320193",
      "companyName": "APPLE INC.",
      "market": "XNAS",
      "positionRank": 1,
      "weightBps": null,
      "weightMethod": null,
      "legalShareability": "public_source_table",
      "rightsStatus": "public_source_documented",
      "asOf": "2026-03-18T16:00:00.000Z",
      "sourceUrl": "https://www.nasdaq.com/solutions/global-indexes/nasdaq-100/companies",
      "provenance": {
        "source": "index_provider",
        "accessionNumber": null,
        "filingUrl": "https://www.nasdaq.com/solutions/global-indexes/nasdaq-100/companies",
        "retrievedAt": "2026-03-18T16:00:00.000Z",
        "parserVersion": "2026-03-17.1"
      },
      "freshness": {
        "status": "fresh",
        "updatedAt": "2026-03-18T16:00:00.000Z",
        "reason": null
      },
      "materialization": {
        "materializationVersion": "2026-03-17.1",
        "parserVersion": "2026-03-17.1",
        "sourceDataset": "index_constituents"
      }
    }
  ],
  "hasMore": true,
  "nextCursor": "2",
  "index": {
    "object": "index",
    "id": "idx_ndx",
    "createdAt": "2026-03-18T16:00:00.000Z",
    "livemode": false,
    "code": "NDX",
    "name": "Nasdaq-100 Index",
    "family": "large_cap_growth",
    "provider": "Nasdaq",
    "region": "North America",
    "market": "XNAS",
    "status": "supported",
    "rightsStatus": "public_source_documented",
    "legalShareability": "public_source_table",
    "constituentCount": 101,
    "sourceUrl": "https://indexes.nasdaqomx.com/Index/overview/NDX",
    "constituentSourceUrl": "https://www.nasdaq.com/solutions/global-indexes/nasdaq-100/companies",
    "syncCadence": "daily_midnight_local",
    "lastReviewedAt": "2026-03-17",
    "notes": "Constituent roster is parsed from Nasdaq's public Nasdaq-100 companies table. Weights are not published on the source page, so OMNI returns rank order and symbol-level golden-record mapping only.",
    "provenance": {
      "source": "index_provider",
      "accessionNumber": null,
      "filingUrl": "https://www.nasdaq.com/solutions/global-indexes/nasdaq-100/companies",
      "retrievedAt": "2026-03-18T16:00:00.000Z",
      "parserVersion": "2026-03-17.1"
    }
  },
  "supportedIndices": [
    {
      "object": "index",
      "code": "NDX",
      "name": "Nasdaq-100 Index",
      "status": "supported"
    }
  ],
  "requestId": "req_example_123",
  "traceparent": "00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01"
}