curl --request GET \
  --url https://api.otark.com/v1/demands \
  --header 'X-Api-Key: <api-key>'

{
  "demands": [
    {
      "id": "dem_KKbRxNEDjBFFlnX1Khiaw",
      "contractPeriod": 12,
      "deliveryVolume": 100,
      "additionalInfo": "Additional information about the demand",
      "country": "DE",
      "state": "Berlin",
      "deliveryStart": "2000-01-01T00:00:00.000Z"
    }
  ]
}