Send WhatsApp OTP Codes With the Telnyx Verify API<br>_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream max-header-md:typography-h3-mobile">Products_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream max-header-md:typography-h3-mobile">Solutions_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream max-header-md:typography-h3-mobile">Pricing_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream max-header-md:typography-h3-mobile">Why Telnyx_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream max-header-md:typography-h3-mobile">Resources_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream max-header-md:typography-h3-mobile">Developers<br>_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream">Contact us_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream">Log in<br>_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream">Contact us_[data-state='open'])_>_*:not([data-state='open'])_&]:text-gray-inactive header-md:[[data-state='open']_&]:dark:text-cream">Log inSign upOpen menu
Back to blog&]:translate-x-xxs ml-xxs [.link-rtl>&]:order-[-1] [.link-rtl>&]:ml-[0] [.link-rtl>&]:mr-xxs [.link-rtl:hover>&]:-translate-x-xxs"><br>Verify API<br>Send OTP Codes Over WhatsApp With the Telnyx Verify API
Send one-time passwords through WhatsApp using the Telnyx Verify API. One request sends the code, one request verifies it. No separate WhatsApp Business API integration required.
By Harpreet Singh Seehra
svg]:w-full [&>svg]:h-full">svg]:w-full [&>svg]:h-full">svg]:w-full [&>svg]:h-full"><br>div:first-child_p:first-child]:mt-[0px] [&>div:first-child_h2:first-child]:mt-[0px] [&_p:first-of-type]:mt-[0px] sm:col-span-8 md:col-[5/13]">A WhatsApp OTP is a one-time password delivered through WhatsApp to confirm a user's identity during signup, login, payment approval, or account recovery. With the Telnyx span]:typography-paragraph md:[&>span]:typography-paragraph-md" href="https://telnyx.com/products/verify-api" style="color:#00C894;text-decoration:none;border-bottom:1px solid rgba(0,227,170,0.3)">Verify API, your app sends a WhatsApp OTP with one POST request and checks the submitted code with a second POST request. The API manages the OTP lifecycle across SMS, WhatsApp, and voice.<br>WhatsApp gives verification teams another delivery channel for users who already use it. span]:typography-paragraph md:[&>span]:typography-paragraph-md" href="https://www.whatsapp.com/about/" rel="noopener noreferrer" target="_blank" style="color:#00C894;text-decoration:none;border-bottom:1px solid rgba(0,227,170,0.3)">WhatsApp reports&]:translate-x-xxs ml-xxs [.link-rtl>&]:order-[-1] [.link-rtl>&]:ml-[0] [.link-rtl>&]:mr-xxs [.link-rtl:hover>&]:-translate-x-xxs"> more than 2 billion users in over 180 countries. That reach matters when SMS delivery is uneven or when users expect messages in a branded WhatsApp thread.<br>WhatsApp OTP overview<br>The Telnyx Verify API manages three parts of the verification flow. It generates the code, delivers the code, and validates the code when the user submits it. If you are building your first verification flow, start with the span]:typography-paragraph md:[&>span]:typography-paragraph-md" href="https://telnyx.com/resources/what-is-otp" style="color:#00C894;text-decoration:none;border-bottom:1px solid rgba(0,227,170,0.3)">OTP guide and the span]:typography-paragraph md:[&>span]:typography-paragraph-md" href="https://telnyx.com/resources/verify-api" style="color:#00C894;text-decoration:none;border-bottom:1px solid rgba(0,227,170,0.3)">Verify overview.<br>When you set the verification channel to whatsapp, Telnyx sends the OTP through WhatsApp instead of SMS. Your application keeps the same two-step pattern. Start the verification. Then verify the submitted code.<br>You do not need a separate WhatsApp Business API integration, custom template management, or a second verification code path. The WhatsApp Business API integration is handled by Telnyx behind the scenes.<br>Note: WhatsApp OTP works for users who can receive WhatsApp messages. Keep SMS or voice fallback for users without WhatsApp access or for failed delivery paths.<br>How WhatsApp OTP works<br>The WhatsApp verification flow has four user-facing steps. Your app requests the code. Telnyx delivers it through WhatsApp. The user enters the code. Your app sends the submitted code back to Telnyx for validation.<br>Verification flow<br>App requests OTP
Verify generates code
WhatsApp...