Developers
SMSFlow | Products
Bulk SMS API
Do it all at scale: integrate, automate, and communicate.
SMSFlow’s Bulk SMS API gives developers and businesses everything they need to send high-volume, high-impact SMS messages with minimal effort.
Whether you’re sending customer alerts, OTPs, appointment reminders or urgent updates, our Bulk SMS API makes it easy to embed reliable messaging directly into your existing systems.
Built for performance, the API supports large-scale deployments with real-time delivery and detailed tracking. And with our developer-friendly setup, you can go live in minutes — no steep learning curves, just clear documentation and straightforward implementation.
Start sending and receiving SMS messages today, powered by SMSFlow’s proven reliability and reach.
Why use SMSFlow’s Bulk SMS API?
Our Bulk SMS API is designed for developers, platforms, and businesses that need a seamless way to embed SMS functionality into their software, websites, or customer engagement tools.
SMS-enable your own environment
Connect to your CRM, ERP, eCommerce system, or custom application.Trigger real-time communications
Use multiple webhook options to automate workflows and respond to events instantly.Enhance message content
Attach files, track delivery, and customise messages with Unicode and long message support.Scale confidently
Send thousands of messages in seconds using our scalable, high-availability infrastructure.Whether you’re a fintech startup, healthcare provider, online retailer, or enterprise team, our API adapts to your use case.
Try it for free
Built for developers, loved by businesses
Easy to integrate
We follow modern RESTful practices and offer detailed documentation with ready-to-use code samples in multiple languages. Build, test, and launch in hours — not weeks.
Global connectivity
Our network spans more than 800 mobile carriers worldwide, allowing you to reach customers across borders, time zones, and use cases.
Secure and reliable
With direct connections to Tier-1 aggregators and telecoms, your messages enjoy enterprise-grade uptime, fast throughput, and dependable delivery.
Transparent reporting
Track every message with real-time status updates, delivery receipts, and detailed logs that support auditing and compliance.Key features of our Bulk SMS API
2-way messaging
Enable conversations across local and international numbersCustom sender IDs
Brand your messages with a sender name your customers trustUnicode support
Send messages in any language, from Arabic to ZuluAttachment support
Add PDFs, images or other files to enrich your communicationScalable infrastructure
Built to handle high-volume traffic without delays or dropsWebhook-ready
Build dynamic workflows that respond to message events in real timeBuilt-in redundancy
Failover routing keeps your campaigns running smoothlyPerfect for these use cases
OTPs and
verification codes
Appointment and
payment reminders
Delivery and
order updates
Customer
service messaging
Crisis or
emergency alerts
Marketing campaigns
at scale
Compare and choose your ideal solution
Our Bulk SMS API is just one of the ways to connect with your audience. Explore our full range of messaging tools, from 2-way chat and marketing SMS to number pools and hosted SMS portals. Each solution is designed to solve specific business needs.
Not sure which to pick?
Chat with our team.
Let’s find the right fit for your goals.
Ready to start sending?
Get your API key, plug it into your system, and start sending SMS messages in minutes.
SMSFlow — Message. Delivered.