By TechTo Networks · Reviewed and updated periodically Quick Answer A transactional SMS API sends service-related messages order confirmations, payment alerts, appointment reminders that reach DND-registered numbers and can be sent 24/7, unlike Promotional SMS. This guide covers what qualifies as transactional under India's DLT framework, the real API call to send one, and the use cases and mistakes specific to this category rather than OTP or marketing messages. Table of Con
