curl --request POST \
  --url https://api.onswitch.xyz/onramp/rate \
  --header 'Content-Type: application/json' \
  --header 'x-service-key: <api-key>' \
  --data '
{
  "asset": "base:usdc",
  "country": "NG",
  "currency": "NGN"
}
'

{
  "success": true,
  "message": "Onramp rate fetched successfully",
  "timestamp": "2024-01-01T00:00:00.000Z",
  "data": {
    "rate": 1500.5
  }
}