SMS Gateway API built for innovation and speed

Guni's provide scalable and easy-to-integrate SMS API that allows businesses to send bulk SMS, MMS and scheduling. Improve customer service, lead generation, and conversation using power for SMS from CRM.

Both-way SMS API

Send text or media messages with Guni's scalable APIs. Get real-time delivery reports and incoming messages via webhook.

Stable API Code

We keep SMS API integration as straightforward as possible while keeping our API design aligned with RESTFUL API best practices.


Guni's SMS gateway APIs are designed to keep innovators in mind. Free sandbox account allows you to invent, validate and develop your integration and workflows.

Join the many other local businesses that have discovered the power of SMS messaging to engage with and add value to their clients.

Get API structure directly to your mobile

Get API structure directly to your mobile

Enter valid number. Request sent successfully.

Get SMS API codes in your favourite language

Our secure REST gateway API provides affordable and fast bulk text and media communication via Australian Telco operators. Guni offers effortless API sample codes available in all programming languages.

Why Guni?

Our 2000+ customers are increasing sales, improving customer engagement, simplifying customer support and reducing no-shows with Guni's easy-to-use SMS Gateway & MMS Gateway, 2-way messages, appointment reminders and API integration.

Your First 30 SMS Are On Us

Get Started

What Our Customers Say

We serve our customers with different features and services such as online SMS & MMS gateway, API, integration and Email to SMS.

What is SMS API?

How does the SMS API work?

SMS API integration empowers CRM systems, websites, and software applications to establish seamless communication through text messaging.
Steps include:

  1. Choose an SMS Provider: Pick one based on your needs, like coverage, cost, and features.

  2. Sign Up & Get API Key: Register and receive an authentication key/token.

  3. Review API Documentation: Understand the required endpoints and data payload format.

  4. Integrate API & Send a Test SMS: Create a function to send an SMS and handle errors.

  5. Handle Callbacks: Implement logic for delivery receipts or status updates.

  6. Error Handling: Incorporate retries, logs, and notifications for failures.

  7. Go Live: Integrate into your live product after testing.

Why is SMS API important?

The significance of SMS APIs extends beyond just sending text messages. Here are some importance of using SMS API with an integrated system.

  1. Instant Communication : SMS allows real-time communication, ensuring immediate delivery of important information.

  2. High Open Rates : SMS messages have over 90% open rates, ensuring messages are seen and read.

  3. Automation : With APIs, repetitive tasks like sending notifications or alerts can be automated, saving time and resources.

  4. Integration : SMS APIs allow seamless integration with other systems, making triggering SMS from various events easier.

  5. Cost-Effective : SMS can be a cost-efficient way to communicate, especially in bulk, compared to traditional methods.

  6. Scalability : Can handle large volumes, adapting to small and large enterprises.

What is the use of SMS Gateway API?

An SMS Gateway API serves as an interface that allows applications, systems, and platforms to send and receive SMS messages through the internet via HTTP protocol. Here are some of the primary uses:

  1. Automated Alerts : Enables businesses to send notifications like transaction confirmations and security codes.

  2. Appointment Reminders : Used by service providers to remind clients of upcoming appointments.

  3. Promotions : Helps retailers send offers, discounts, or product announcements.

  4. 2FA : Enhances security by sending one-time access codes to users.

  5. Customer Service : Integrates SMS for quicker support and query resolution.

  6. Feedback : Allows businesses to gather post-service or post-purchase feedback.

  7. Order Updates : Notifies customers of e-commerce order statuses.

  8. Emergency Alerts : Enables entities to send urgent bulk notifications.

  9. CRM Integration : Facilitates better customer communication via CRM systems.

  10. Billing Reminders : Reminds customers of due payments or upcoming bills.