Transactional speed
Power account alerts, order updates, and business-critical notifications with simple request payloads.
Programmable Messaging
SMS API
Global programmable SMS for transactional, OTP, and campaign messaging.
Ship reliable messaging flows with a developer-friendly API, high-throughput delivery, and the control teams need across alerts, promotions, and customer engagement.
HTTP API
Bulk delivery
Global routing
Fast onboarding
Platform benefits
Why teams choose this product path inside WhySMS.
- Launch one-way and two-way SMS flows from a single API integration.
- Support transactional alerts, OTP, reminders, and marketing campaigns.
- Scale high-volume traffic with routing options built for enterprise reliability.
- Coordinate sender strategy and onboarding with business support when needed.
Campaign control
Run broadcast messaging with audience segmentation, scheduling support, and throughput built for volume.
Integration flexibility
Connect through HTTP API or existing infrastructure layers that already support SMS automation.
Operational visibility
Track delivery workflows and keep teams aligned around message operations and uptime expectations.
Use cases
Where this product fits in real customer communication journeys.
OTP and user verification
Order and delivery notifications
Promotional SMS campaigns
Support and service updates
Technical overview
cURL
curl --request POST 'https://staging.whysms.com/api/v1/contact' \
--header 'Accept: application/json'
Integrations and operations
Fit this product into the systems your business already depends on.
REST / HTTP API
ERP and CRM systems
E-commerce platforms
Internal message orchestration tools