API documentation


Getting started with our APIs


This documentation is intended for developers who want to write applications that can interact with the Clickatell APIs. This guide will enable you to:

  1. Decide which API is best suited to your needs.
  2. Send your first message.

Which API is best suited for me?

We have a few options for you to choose from. Here is a quick comparison of the APIs:

REST/Secure HTTP SMTP FTP SMPP SOAP XML
Description A RESTful interface to the Clickatell gateway. Simple, fast, highly scalable Send an email to our server to send bulk SMS Upload a text file to an FTP server to send bulk SMS Typically used by enterprises and large organizations for high volume sending. A SOAP interface to the Clickatell gateway An XML interface to the Clickatell gateway
Minimum Volume Requirements None None None None Monthly bulk SMS sending (i.e: thousands of messages per month) None None
Ideal for real-time messaging Yes Yes No No Yes Yes Yes


How to send your first message

To send your first message, select the API you wish to use: