curl --request POST \
  --url 'https://api.stateset.com/api/v1/fulfillment/ships/{id}/complete' \
  --header "Authorization: Bearer $STATESET_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{
  "shipped_by": "string",
  "shipping_cost": "8.00",
  "tracking_number": "1Z999AA10123456784"
}'

{
  "assigned_to": "string",
  "carrier": "UPS",
  "created_at": "2026-08-31T14:22:05Z",
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "order_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "pack_task_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "shipment_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "shipping_cost": "8.00",
  "status": "pending",
  "tracking_number": "1Z999AA10123456784"
}