Secure. Fast. Global. | The Ultimate One-Time Password (OTP) Solution
Why Use VerifyAPI?
In today’s digital environment, OTP delivery is not just about sending a code—it’s about making sure your users receive it quickly, reliably, and through the most convenient channel.
While SMS remains a strong and global communication channel, users today are also active on platforms like WhatsApp, Viber, and Telegram. Verify API enhances your OTP strategy by combining these channels into one intelligent workflow.
From code generation and delivery to validation and fallback logic, Verify API manages the entire process, so you can focus on your product.
Why Businesses Choose Verify API
- Higher Conversion: Ensure your users receive their OTP without delays. If one channel is not effective, Verify API automatically switches to another, helping reduce drop-offs.
- Cost Efficiency: Optimize your costs by prioritizing different channels. Failed OTP attempts on WhatsApp, Viber, Telegram, and Voice OTP are free of charge. If the process falls back to SMS, normal SMS charges apply.
- Global Reach: Send OTPs to 200+ countries across multiple channels, ensuring maximum reach and flexibility.
Key Features
1. Multi-Channel Delivery: Connect with users on the platforms they already use daily, including WhatsApp, Viber, Telegram, Voice OTP, and SMS, improving delivery speed and user experience.
2. Smart Fallback Logic: Automatically switches channels if delivery is not successful, based on your preferred sequence, for example: WhatsApp → Viber → Telegram → Voice → SMS. This happens instantly and automatically, with no manual retries needed.
3. Customizable Security: Set your own verification rules, including OTP length, expiry time (TTL), and maximum retry attempts, so the process matches your security needs.
4. Developer Friendly: Simplify integration with a single API endpoint for all channels and use real-time webhooks for status tracking and monitoring.
5. Localization: Support multiple languages and custom templates to create a more trusted and user-friendly verification experience.
Flexible OTP Management
Verify API gives you full flexibility. You can use our secure OTP generation and validation system, or you can deliver your own generated OTP codes using our infrastructure.
This means you can benefit from multi-channel delivery and smart fallback without having to build or manage a complex OTP workflow yourself.
How It Works (The 3-Step Flow)
1. Initiate: Send a request to our API with the user’s number and your preferred channel sequence.
2. Deliver: We generate the OTP, or use your own code, and send it through your selected channel order. If delivery is not successful on one channel, we automatically retry using the next one.
3. Verify: The user enters the code in your app, and we return a final Success or Fail result.
Use Cases Examples
- User onboarding
- Two-factor authentication (2FA)
- Transaction authorization
- Password resets
Why It Matters
With Verify API, you are not limited to a single delivery path. You improve the chances of successful OTP delivery, offer a smoother experience to your users, and reduce the need for manual retries or support requests.
Stop managing delivery logic and start focusing on growth. SMS.to Verify API helps your users receive their codes quickly and reliably.
Ready to start?
Create an account on SMS.to and submit your request for activation here: Verifications Request Activation | SMS.to
Step By Step Guide: Verify API Solution: Activate, Manage Your Settings & View Results : SMS.to
Documentation: developers.sms.to
If you have any questions, please send us an email at support@sms.to