AEPS api integration in php CI.

suppose , we are buying from netpaaiisa api, and we will integrate it to our abc.com which is our main site, and also we have created a whitelable user under abc.com named as xyz.com. So, here we will integrate api of abc.com not from netppaaisa.com. Note that we already have some aeps api integration codes too.
API documentation will be provided to you.