SOAP API
SOAP: SOAP is the emerging defacto standard for the lightweight integration of systems developed in different languages/technologies and/or on different platforms.
HTTP API
HTTP: Lets client applications interact with the SMS gateway by sending (and receiving) HTTP/S requests and responses.
PHP API
PHP: Use the same technology that powers so many sites on the web to SMS enable your site. This API is built on our HTTP/S API and can easily ported to Cold Fusion, ASP, Pearl or any other web scripting language.