Constant Contact setup with API

I am looking to setup Constant Contact with an API that will allow me to ask customers for a custom field that is their birthday or anniversary. That custom field information will then be used in the backend for me to schedule broadcast messages to subscribers before their birthday. I only need it setup so that the API gathers the correct birthday information so I can use it. I will setup the broadcast messages based on that information. **So please do not include that part of the project in your bid.** ## Deliverables Ideally I would like to work with the programmer to learn what needs to be done so I can do it myself in other installations of Constant Contact since I have several websites with newsletters.