Web Design with API

I need our company website to have API code that works with Livedrive services and payment gateway. Livedrive is a cloud storage company, and we have purchased the white labeling from them. Their web address is www.livedrive.com. Take a look at their services because it is the same thing that we want to sell on our website. We our being hosted by www.volusion.com. We have all of the necessary items like the ssl to make the store work and to process credit cards. We simply need these items to be put together.