On Amazon Marketplace, there can be multiple offers from different sellers on a single product. So for example Duracell Coppertop AA Batteries are sold by 110 different merchants.
What I need to do is programmatically add my own offer to specific product, join those other sellers offering it.
I know ASIN's of the products I need to place offers to.
The question is what are the steps to place another offer to an existing product through Amazon API.
I think I should upload a Flat File though MWS, but unable to find anywhere what should be the exact format to comply with the above requirement.
Any help would be much appreciated.
Your options are:
Manually add items through the Seller Central browser interface
Use flat files to upload your data. I have no experience with this, but look at _POST_FLAT_FILE_INVLOADER_DATA_ and _POST_FLAT_FILE_LISTINGS_DATA_ .
Use XML feeds. The workflow is described here: Amazon MWS workflow (XML)