curl --request POST \
  --url https://api.getsly.ai/v1/v1/funding/estimate-fees \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "source_type": "card",
  "amount_cents": 123,
  "currency": "<string>",
  "destination_currency": "<string>"
}
'

{
  "data": {
    "provider_fee": 123,
    "sly_fee": 123,
    "fx_spread_cents": 123,
    "total_fee": 123,
    "net_amount_cents": 123
  }
}