Hello,
I read your project details and understood them. Do you have any Strick Deadline? I have few questions regarding your project Can we discuss them over chat? I have experience with the following APIs:
Restful, Soap base, eBay, Google, WooCommerce, ZenDest, Yahoo, Twitter, Facebook, Youtube. I also implemented OAuth 2.0
We can decide the budget after the discussion. So, feel free to contact me. Thanks