Documentation
OpenSMS API documentation
OpenSMS provides a REST API for outbound SMS, OTP verification, transactional templates, webhook events, and Android gateway pairing.
Core integration topics
- Introduction: authentication, environments, response format, and quick start
- Messages API: send SMS, poll delivery, and process inbound replies
- OTP API: issue and verify one-time passcodes through your backend
- Transactional API: manage templates and send reusable alert flows
- Webhooks: verify signed delivery events and automate downstream systems
- Gateways: pair Android phones and keep your SMS fleet online