OTP & Verification
Send SMS OTP codes for registration, login verification, password resets, and 2FA challenges from the same API layer.
SMS Messaging
SMS API
Transactional SMS, OTP delivery, alerts, and campaign messaging from one API.
Use one SMS API for transactional sends, verification codes, alerts, delivery reports, and bulk campaign traffic.
Transactional SMS
OTP codes
Sender IDs
Delivery reports
Platform benefits
Why teams choose this product path inside WhySMS.
- Launch transactional and bulk SMS flows from the same integration.
- Handle OTP delivery, account alerts, reminders, and promotional traffic in one stack.
- Use sender IDs, reporting, and throughput controls for operational visibility.
- Keep engineering and campaign teams aligned on one messaging workflow.
Transactional messaging
Deliver account alerts, order updates, service notifications, and security messages with simple payloads.
Campaign control
Run audience broadcasts, promotional sends, and sender ID traffic from the same product layer.
Delivery reports
Track message status and reporting signals so product, campaign, and ops teams can act fast.
Use cases
Where this product fits in real customer communication journeys.
User registration
Login verification
Password reset messages
Two-factor authentication (2FA)
Technical overview
cURL
curl --request POST 'https://staging.whysms.com/api/v1/status' \
--header 'X-Sender-ID: WHYSMS' \
--data 'channel=sms&type=otp&flow=login_verification'
Integrations and operations
Fit this product into the systems your business already depends on.
REST / HTTP API
CRM and ERP systems
E-commerce platforms
Internal workflow tools