SMS ON YOUR TIMELINE

Control when every SMS lands with scheduled message sending

Deliver messages instantly or at a later date with scheduled message sending, part of the the Sinch SMS API.

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WHY IT MATTERS

Deliver SMS at the best moment

Let your developers and marketers say goodbye to wrestling with time zones, queues, and compliance. With scheduled message sending, Sinch handles immediate or scheduled delivery so your messages land at the right local time with high precision.

Boost engagement

Deliver at the ideal time for every customer to boost open rates and satisfaction without manual work.

Streamline operations

Replace custom schedulers with one send_at parameter and let Sinch queue and dispatch.

Prioritize urgency

Low-latency routing pushes OTPs and alerts ahead of bulk traffic for faster, reliable delivery.

BOOST ENGAGEMENT

Schedule SMS for local, compliant delivery windows

Send promotions, reminders, and updates when customers are most receptive. By converting local times to a UTC timestamp in your API call, you can precisely control delivery in any time zone and within allowed sending hours.

  • Use a single UTC timestamp for precision

  • No separate regional campaigns to manage

  • Higher read and conversion rates

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MORE EFFICIENT OPERATIONS

Replace custom queues with one API call

Automate time-based communications like reminders or follow-ups without building complex scheduling systems.

  • send_at (ISO 8601) handles future sends

  • Sinch queues messages on enterprise-grade infrastructure

  • Real-time delivery reports confirm precise dispatch

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DELIVER CRITICAL MESSAGES FASTER

Priority routing for time-sensitive traffic

Fraud alerts and passcodes reach users in near real-time thanks to enterprise-grade prioritization designed specifically for transactional messages.

  • Low latency on OTPs and alerts

  • Distinguishes between bulk and critical messages

  • Protects brand trust and user security

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WHAT’S INCLUDED

Built-in capabilities of Sinch Send SMS API

Scheduled sending

Use the send_at parameter to queue any SMS for future delivery with one ISO 8601 UTC timestamp.

Low-latency path

Transactional traffic is automatically prioritized for near real-time delivery.

Time-zone aware

The API uses UTC for scheduled sends. Provide one clear timestamp and deliver messages across every time zone.

Delivery window control

Send promotional texts only during compliant business hours.

Time stamped reports

Webhooks return exact send and delivery times for every message.

Carrier-level prioritization

Make sure your most critical traffic always gets through first.

Highly reliable queuing

Enterprise infrastructure keeps scheduled SMS safe—even at massive scale.

Simplified global scheduling

One API handles timing across hundreds of countries and time zones.

REAL-WORLD USES

Popular ways teams use scheduled sending

Appointment reminders

Send confirmations 24 hours and again one hour before a booking so customers don’t miss important meetings.

Time-sensitive alerts

Send fraud warnings or one-time passcodes in near real-time where every second matters.

Global marketing campaigns

Launch a Black Friday offer at 9 a.m. local time worldwide without juggling multiple regional lists.

Abandoned cart nudges

Trigger a friendly reminder exactly one hour after a shopper leaves items behind to boost conversions.

Birthday & anniversary messages

Automate birthday and anniversary messages for a personal touch.

Scheduled message sending FAQs

Message scheduling is a free, standard feature of the Sinch SMS API that delivers messages in near real-time or at a future time you define for high-precision timing.

Include the send_at parameter in your API request with an ISO 8601 UTC timestamp, such as ‘2025-11-10T09:00:00Z’.

Always send UTC to avoid ambiguity. Convert local times to UTC before making the API call.

Over 95% of transactional messages are delivered in under 10 seconds, while delivery times for bulk promotional messages may vary.

Yes. Message scheduling is a free, standard feature. You’re only billed when the SMS is sent.

You can expect high-precision dispatch with >99.99% accuracy for requested times.

Yes. Use the delivery window control and scheduling, so you only send in compliant hours in each recipient’s local time.

No. You only need an active integration with the Sinch SMS API.