authorize.net mac API

I have built a kiosk environment in MAC OSX 10.6.6 and i wanto charge a PC user before he starts using the system. i have the application made. I wanto use authorize.net for authenticating. With what i have searched, CIM SOAP is the method i should use.

My question is is there any webservice available on authorize.net where i can send a xml file and expect a response .? If not, what other options do i have??

thanks in advance. If any sample code or reference is there, let me know( FOR MAC)

Authorize.Net's API is platform agnostic so it doesn't matter what environment you use it in. It can be a Mac, PC, POS system, or website, etc.

Their AIM API has an XML interface for processing transactions. You can get a developer's account to test your integration with. They also offer sample code to get you started.