Developer resources
Messaging API guides for real product workflows.
These guides explain the application decisions around message delivery: how to send a verification code without confusing delivery with verification, how to classify email, and how to observe multi-channel notification outcomes.
- OTP delivery · backend integration · security controls
Send OTP codes with an SMS API
A practical delivery pattern for one-time codes, including which parts belong in your application and which parts a messaging API handles.
Read guide → - Email classification · messageType · sending streams
Transactional vs broadcast email
Classify messages by purpose, separate transactional and broadcast sends, and set the correct Senddio message type.
Read guide → - Architecture · six channels · delivery status
Build a multi-channel notification workflow
Plan channel selection, queue states, webhooks, and fallback behavior when a product event needs to reach a user.
Read guide →