There are a number of changes to the Product API get, delete, list, insert
methods, and the Product Resource from v2 to v2.1. For more information on
updating your application for v2.1, see
Migrating from Content API v2 to v2.1.
Supplemental Feeds API
The Supplemental Feeds API is a new functionality available only in the v2.1 API that allows you to update and delete data associated with specific feeds.
Product insert
POST https://shoppingcontent.googleapis.com/content/v2.1/merchantId/products?feedId=feedId
The v2.1 product.insert works like the v2 product.insert unless you provide
a valid supplemental content API feedId (a numeric value), which causes the
data associated with the duplicated item IDs to update the existing items.
You must include the offerId, targetCountry, channel, and contentLanguage.
All other attributes are optional.
Use this call to change values for an existing item, such as price or availability, just as in a supplemental feed.
To create a supplemental Content API feed, first, create a supplemental feed and
select the Content API as the feed type. On the next screen, select the feed
that you would like to supplement. The supplemental feed provides the
feedId after it creates the feed.
Product delete
DELETE https://shoppingcontent.googleapis.com/content/v2.1/merchantId/products/productId?feedId=feedId
Calling this method removes the supplemental data provided by the specified supplemental Content API feed.
Multi-client accounts
It is possible to create
supplemental feeds for multi-client accounts.
Once created, supplemental data can be inserted to all sub-accounts with
the same feedId.