ASP.NET Core 8 Service Email Verification Guide

Add real-time email verification and disposable-email blocking to ASP.NET Core 8 Service with the VeriShield Edge API. The snippet below gates a signup and returns the canonical email identity.

Language

C# 12

Ecosystem

.NET / HttpClient

Latency

< 85ms

Install

Shell

dotnet add package Microsoft.Extensions.Http

Verification code

C# 12

public class VeriShieldClient {
    private readonly HttpClient _http;
    public VeriShieldClient(HttpClient http) => _http = http;
    public async Task<bool> IsAllowedAsync(string email) {
        var req = new HttpRequestMessage(HttpMethod.Post, "https://verishield-edge-api.p.rapidapi.com/v1/verify");
        req.Headers.Add("X-RapidAPI-Key", Environment.GetEnvironmentVariable("RAPIDAPI_KEY"));
        req.Content = JsonContent.Create(new { email });
        var resp = await _http.SendAsync(req);
        var report = await resp.Content.ReadFromJsonAsync<JsonElement>();
        return report.GetProperty("fraud_risk").GetProperty("recommendation").GetString() != "BLOCK";
    }
}

What this protects against

Disposable and temporary inboxes, Gmail dot-trick and plus-alias multi-accounting, high-entropy bot usernames, and freshly registered fraud domains. The API returns a 0-100 fraud score with an ALLOW, CHALLENGE_2FA or BLOCK recommendation.

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