Fraud Detection & Risk Scoring in .NET

Returns a Score (0–100) and a human RiskLevel, plus the Factors that drove it. Use RiskScoreAsync() for the caller's IP.

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

var risk = await client.RiskScoreAsync("185.220.101.1");

Console.WriteLine(risk.Score);     // 88
Console.WriteLine(risk.RiskLevel); // "high"
if (risk.Factors.Ip is { } ip)
    Console.WriteLine($"{ip.IsTorNode} {ip.IsDatacenter}");

if (risk.Score >= 75)
{
    // block, or send to manual review / step-up auth
}

Same 0–100 scale, driven by email signals (disposable provider, invalid syntax). Use it to grade leads or gate sign-ups by address quality.

var risk = await client.EmailRiskScoreAsync("user@mailinator.com");

Console.WriteLine($"{risk.Score} {risk.RiskLevel}"); // 90 high
if (risk.Factors.Email is { } email)
    Console.WriteLine(email.IsDisposable); // True

Returns the underlying reputation data for an IP — use it when you want the source signals rather than a computed score.

var reputation = await client.IpReputationAsync("185.220.101.1");
Console.WriteLine(reputation);