curl --request POST \
  --url https://api.cnaught.com/v1/quotes/air-freight \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "freight_mass_kg": 100,
  "distance_km": 10.5
}'

{
  "amount_kg": 15,
  "price_usd_cents": 2350
}