ConnectTxt now provide example code in several different programming languages. These programming APIs can be used to easily integrate ConnectTxt functionality into your existing application.
The PHP API is currently in development. The API is capable of sending and receiving messages, as well as retrieving status updates. This new version, v0.2, incorporates PHPUnit test classes, and is capable of retrieving account credit information from the ConnectTxt website. Future versions will incorporate support for the SOAP API and address book uploads.