REST SMS API

Integrate SMS into your new or existing app with this Bulk SMS API

Get started with a few lines of code

Add bulk SMS functionality into your application. Try one of the code snippets below, or view our SMS API Documentation for more HTTP callbacks.
Send SMS
curl https://api.transmitsms.com/send-sms.json \
  -u [API Key]:[API Secret] \
  -d message='[Insert Message]' \
  -d to=[Phone Number 1],[Phone Number 2],[Phone Number 3]
Send, receive, and retrieve SMS data from our fully documented libraries for .NET, C#, PHP, Ruby, and GO. image

Client Libraries

Send, receive, and retrieve SMS data from our fully documented libraries for .NET, C#, PHP, Ruby, and GO.

It takes just a few minutes to get started with our SMS Gateway API. Retrieve your free API key, copy a few lines of code, and start sending and receiving text messages within your new or existing applications.

SMS API Features

Accessing your  icon
Accessing your API Key and Secret
Test our services by signing up for a free account to access your API key, and to create an API secret.
Choose your GET icon
Choose your GET or POST callbacks
Add SMS functionality into your service through our well documented parameters.
Send SMS, recei icon
Send SMS, receive replies, and retrieve data
Deliver text messages through the HTTP callbacks of your choice. Reply to responses, and get campaign reports.

Over 3,000 Integrations Available

Integrate this leading SMS solution with your existing software for improved user communication. Pairing with platforms such as Shopify, Facebook, Salesforce and more is easy to set up and even easier to use.

Why Burst SMS is for
SMS API

100% SMS Delivery Guarantee icon
100% SMS Delivery Guarantee

All messages are sent through ON-NET connections to local carriers. No grey routing.

Virtual Mobile Numbers icon
Virtual Mobile Numbers
Get access to high-quality bulk SMS numbers to maintain brand consistency and recognition.
24/7 x 365 Support icon
24/7 x 365 Support
Get world-class support around the clock. Our team of messaging experts are here to help.
Feature-rich icon
Feature-rich

From our flexible SMS API and integrations to email to SMS and Quick SMS, see why 30,000+ businesses choose burst for SMS advertising.

No Contracts icon
No Contracts
Our bulk SMS service is prepaid. No need to worry about monthly contracts or commitments.
Ease of Use icon
Ease of Use

All our SMS solutions are designed to be easy to use. Choose from an intuitive web interface, REST SMS API, or an extensive selection of integrations to connect with your pre-existing tech stack.

Integrate SMS into your
SAAS platformfavorite appcurrent tech stack

See how easy it is to implement SMS into your business with this 14 day trial. Get full access to our feature loaded online SMS platform.