Our SMS Api can be accessed using HTTP or HTTPS and accepts POST data to allow a user to automate the sending of an SMS through an account on the Text Message SMS API.
The format of a request to the API is very simple, comprising of a username and password, a recipient and a message (the message is URL encoded).
The response is also a very simple to understand entity, it is written in XML and any XML reader will be able to parse this, it is also quite human-readable.
Fortunately the API will only charge when a message is successfully delivered to the mobile numbers network, so numbers that have invalid formatting (ie: 08fr21sd or 123) will not have a charge for the attempt, however if the format of the number is valid then there is a charge.