I use green by phone to process eCheck and I recently found out that they offer an API,

Unfortunately my knowlege on coding is limited, they have a sample HTTP post and HTTP get as well as SOAP 1.1 or 1.2 but I don't know how to use the information to make an actual payment module.

I made an attempt at trying to change around the eCheck.php module modified by osCommerce because they have some of the same fields with the exeption of customer's email address for notification purposes.

How do I use the API information offered by this company to make a payment module that will verify and accept real-time eCheck payments?