Hi,
I've taken a look at the shortlink for your HTML form, and am interested in this project so would like to know a little more about it. Unfortunately the second shortlink you provided (to the API) is a 404 page, it looks like you can't access the API without being logged in to that site, so we'd need access to be able to see more detail.
(on that note, as an aside, if you don't want to work with me, no problems, but do be wary of any freelancers promising they can do it if they haven't had access to the API!)
I am experienced with PHP development, and integration with back end databases such as SQL Server and MySql so I feel I have the skills to help you with this. Please do take a look at my profile to see reviews from previous employers - I have a 100% completion rate and generally don't ask for interim milestones, only payment at the end.
Regards
Chris
PulseLab Ltd (UK)