Hello,
I would like to offer you my prestashop skills.
I can create import script/module to import and update product from API you mentioned.
If you are interested can you please send me API description?
===============
I work daily with prestashop over 5 years. I know prestashop from top to bottom. I am familiar with every aspect of this eshop system. Prestashop settings, tweaking, modifiing core and theme files, custom module development, you name it.
You can also check many of my positive reviews here on freelancer.
Thank you for your time.
Best Regards,
Jarda