Whatsapps OTP verification implemented in .net core API

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Sarthak Varshney · Answer

WhatsApp's OTP verification in a .NET Core API, you'll need to use the Twilio API for WhatsApp, as WhatsApp does not provide a direct API for OTP verification. Twilio provides a way to send messages to WhatsApp numbers, which can be used for OTP verification. Set up a Twilio account: Sign up for a Twilio account if you don't have one already. Obtain Twilio API credentials: Get your Account SID and Auth Token from the Twilio console. Install Twilio NuGet package: Install the Twilio NuGet package in your .NET Core API project. dotnet add package Twilio Send OTP via WhatsApp using Twilio : using System; using Twilio; using Twilio.Rest.Api.V2010.Account; using Twilio.Types; public class OtpService { public void SendOtpViaWhatsApp(string toPhoneNumber, string otp) { // Twilio credentials string accountSid = "your_account_sid"; string authToken = "your_auth_token"; // Initialize Twilio client TwilioClient.Init(accountSid, authToken); // Message body string messageBody = $"Your OTP for verification is: {otp}"; // Send message via WhatsApp MessageResource.Create( from: new PhoneNumber("whatsapp: "), to: new PhoneNumber($"whatsapp:{toPhoneNumber}"), body: messageBody ); } } Call the SendOtpViaWhatsApp method with the recipient's phone number and the OTP to send the OTP message . string recipientPhoneNumber = "recipient_phone_number"; string otp = "123456"; // Replace with your OTP var otpService = new OtpService(); otpService.SendOtpViaWhatsApp(recipientPhoneNumber, otp); Ensure you have configured your Twilio WhatsApp sandbox : Set up your sandbox by sending "join " to the WhatsApp number provided in your sandbox settings. Configure the incoming message webhook for your sandbox in the Twilio console to point to your API endpoint.

Whatsapps OTP verification implemented in .net core API

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