curl --request POST \
  --url https://api2.upstackified.com/db-mgmt/api/query-attribution \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --header 'x-pixel-id: <api-key>' \
  --data '
{
  "pixelId": "5f1e6a4f-...",
  "dimension": "utm_source",
  "dateRange": {
    "start": "2026-04-01",
    "end": "2026-04-30"
  },
  "attributionModel": "first_click",
  "attributionWindow": 30
}
'

{
  "results": [
    {
      "dateRange": {
        "start": "2026-04-01",
        "end": "2026-04-30"
      },
      "dimension": "<string>",
      "dimensionFilters": [
        [
          {
            "dimension": "<string>",
            "value": "<string>"
          }
        ]
      ],
      "data": {
        "primary": [
          {
            "dt": "<string>",
            "start": "<string>",
            "end": "<string>"
          }
        ],
        "compare": [
          {
            "dt": "<string>",
            "start": "<string>",
            "end": "<string>"
          }
        ]
      },
      "measureDetails": [
        {
          "measure": "<string>",
          "isAverage": true,
          "isPercentage": true,
          "calculatedAverage": true,
          "success": true,
          "primaryAvg": 123,
          "compareAvg": 123,
          "primarySum": 123,
          "compareSum": 123,
          "percentDiff": 123,
          "hasPacing": true,
          "preferredTrendDirection": "up"
        }
      ]
    }
  ]
}