You can sign up for a free account at [url removed, login to view] that you need to be able to solve this.
Your task is to write one PHP-page that use the [url removed, login to view] to:
1) Fetch the data templates available and ask the viewer of the page which template they wish to use
2) Fetch the n number of custom api_key that are used on those pages so the viewer can fill in those fields, as well as the optional and required data such as full name, email, mobile phone number (and regexp it so it becomes n a valid format), until finally:
3) Post the input variables such as the correct template with the correct data will go out via the [url removed, login to view] service!