curl --request GET \
  --url https://production.hifibridge.com/v2/onramps/rates \
  --header 'Authorization: Bearer <token>'

{
  "fromCurrency": "usd",
  "toCurrency": "usdc",
  "conversionRate": "1",
  "conversionRates": [
    {
      "transferType": "default",
      "conversionRate": "1"
    }
  ]
}