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

{
  "contracts": [
    {
      "id": "con_a1b2c3d4",
      "external_id": "PPA-2025-0042",
      "type": "ppa",
      "status": "in_progress",
      "delivery_start": "2026-01-01T00:00:00Z",
      "delivery_end": "2026-03-31T23:45:00Z",
      "seller": {
        "name": "GreenCo Energy BV",
        "eic": "11YGREENENERGY-Z",
        "tso": "DE_TENNET"
      },
      "buyer": {
        "name": "GreenCo Energy BV",
        "eic": "11YGREENENERGY-Z",
        "tso": "DE_TENNET"
      },
      "created_at": "2024-11-20T10:00:00Z",
      "ppa_type": "indexed",
      "period": "Q1-2026",
      "delivery_profile": "ENWEX Solar 2026",
      "asset": {
        "id": "ast_w1x2y3z4",
        "name": "Zonnepark De Wilgen",
        "nominal_power": 25,
        "technology": "solar",
        "tso": "DE_TENNET"
      }
    }
  ],
  "pagination": {
    "limit": 10,
    "has_more": true,
    "next_cursor": "txn_k8m2p4q7r1"
  }
}