API Integration

Hello, I need the ability to add and manage members for my website. The functionality and database on our server does NOT need to be created, we are using a third party service to store all of the data and make credit card charges. Our website only needs to be able to submit the information to the third party API and display results from the API on the pages. Our main site uses Drupal, and I would prefer just creating the new pages on the drupal system, but if you need to you can create separate pages. These are the pages that I need to have created. 1. Registration Page Register a New Account and make initial charge + Set Default Credit Card Using Existing API using new user I Need a Registration Page using the fields and style as this [login to view URL] 2. User Management I need a page where I can update user account settings thru the API Settings: Member Registration Information + Change Password 3. Payment Management I need a page where I can add money to user account + show past charges + edit credit card 4. I need an email automatically sent upon: User registration with registration details and password Password Change Payment Added 5. Call Buttons I need to have a button created that when pressed by member will submit a charge to the API using members account informatio