API for obtaining information about products from various suppliers - where to look?

Question

API

Hello everyone
. I have an idea to make a web service related to Internet commerce - I can’t figure out how to make it so that heterogeneous suppliers can send their goods to my server at the click of a button. Everyone has different categories, different SKUs for the same products, so I'm a little confused.
Can anyone suggest which way to look?
Thanks in advance for good advice.

Answer 1

Oh, more marketplaces!
In essence, everything is banal:

• you need to have your own categories - you provide the service, not them
  
• SKUs are a custom field, moreover, string and unique only within one supplier
  
• with the help of a button, they should implement it themselves - not your headache. you can only offer ready-made integration solutions for popular products