Master ISP Detection

Form-level Validation (Recommended)

// Real-time currency conversion with currency-exchange.xyz API
async function convertCurrency(from, to, amount) {
  const response = await fetch(`https://currency-exchange.xyz/api/v1-convert-currency?from=${from}&to=${to}&amount=${amount}`, {
    headers: {
      'accept': 'application/json',
      'x-api-key': 'YOUR_API_KEY'
    }
  });
  const result = await response.json();

  if (result.isProxy || result.isVPN) {
    return {
      valid: false,
      message: "Proxy/VPN connections are not allowed for security",
      suggestion: "Please use a broadband or dedicated connection"
    };
  }

  return {
    valid: true,
    isp: result.aso,
    ip: result.ip,
    country: result.countryCode,
    city: result.city.name
  };
}