Domain Age Checker in .NET

Returns the registration date and the age in years and days.

var client = new IpApiClient(Environment.GetEnvironmentVariable("IP_API_IO_KEY")!);

var age = await client.DomainAgeAsync("example.com");

Console.WriteLine(age.IsValid);          // True
Console.WriteLine(age.RegistrationDate); // "1995-08-14"
if (age.AgeInDays is { } days)
{
    Console.WriteLine(days);             // 11000+
    if (days < 30)
    {
        // treat brand-new domains as higher risk
    }
}

Check a list of domains in one request (throws if empty).

var batch = await client.DomainAgeBatchAsync(
    new[] { "example.com", "brand-new-domain.xyz" });

foreach (var (domain, age) in batch.Results)
    if (age.AgeInDays is { } days)
        Console.WriteLine($"{domain} {days}");