curl --request GET \
  --url https://{defaultHost}/api/v1/usage/quantity-price \
  --header 'x-api-key: <api-key>'

{
  "message": "Quantity price fetched",
  "data": {
    "customer_key": "cust-6d11ca90",
    "feature_key": "feature_interview_booking",
    "quantity": 500,
    "price": 3000,
    "unit": "USD"
  }
}