curl --request GET \
  --url https://api.sandbox.sardine.ai/v1/fiat-currencies \
  --header 'Authorization: Basic <encoded-value>'

{
  "data": {
    "symbol": "USD",
    "supportingCountries": [
      "US"
    ],
    "name": "US Dollar",
    "paymentOptions": [
      {
        "name": "ACH",
        "processingTime": "Instant - 3 days",
        "dailyLimit": 30000,
        "maxAmount": 30000,
        "minAmount": 5000
      }
    ]
  }
}