This blog post offers guidance to private developers on how to migrate from MWS to SP-API.
Recently, Amazon announced end of life dates for Amazon Marketplace Web Service (MWS). This announcement applies to all developers, including private developers. Private developers are developers who build applications that integrate their own company with Amazon APIs. This blog post offers guidance to private developers on how to migrate from MWS to Selling Partner API. Selling Partner API (SP-API) is a REST-based API that helps Amazon selling partners programmatically access their data on listings, orders, payments, reports, and more.
Read the full article on the Selling Partner API Blog.