BulkSMS provides a number of APIs to allow developers to integrate functionality into their systems.
Which API you use will depend on your own application.
This is our existing HTTP API, based on form encoded requests and text responses.
This API, based on REST and JSON is in beta.
Some features, such as long unicode messages, are only available via this API.
SMPP is a standard within the mobile industry.
If you’re integrating an existing application which has support for SMPP and you are expecting to send high volumes, this may be a good choice.