Hi there ^^ I'm delphi coder actually I used to deal with simillar jobs just like the one you have mentioned , I mean dealing with web services and API using either delphi built-in objects or windows API to achieve that , for your project Prestashop supports REST api which is also a part of DELPHI we can use REST Requests and Responses to achieve your goal ^^ anyway provide me with more info and I will do my best ^^
Best Regards