SMS ending API :multiuser accounts/ online Payment

This is going to be a system relying on [login to view URL] http API, so it is easier than a real SMS gateway : The main functions are : admin side : Multiple users account Secured auth Admin to manage these accounts Possibility to change the templates for each account Payment gateway implementation to buy credits user side : Credit management per account (you have xxx credit, you have no more credit, buy more credit) It has to be developed with a language change option (I'd like to propose later more languages) Each user has as many address books as he wants The address books have to be synchronized with the one stored at [login to view URL] (cf the documents enclosed) Each user can define his own fields for the address book (name, age,...) In a 10 fields limit, he can also use these fields a variables in the message (dear [name], your birthday is [birthday]....) you show contacts depending on "select" operation an you address book (show only male, less than 25 years...) Birthday option, since aql provides a delayed sms sending system Import and export of address books to csv files The typical business case is a nightclub that wants to send news to its customers.