The Stripe Java Library by Stripe is a REST resource. The library API is designed for predictable, resource-oriented URLs and HTTP response codes to indicate API errors. Further, it is aims to support the built-in HTTP features, like HTTP authentication and HTTP verbs with off-the-shelf HTTP clients, and the support cross-origin resource sharing to allow interaction with the API from a client-side web application. The returns are in JSON, including errors.
Shopify has replaced its legacy Discounts API with the New Price Rules API. The API keeps what worked from the Discounts API, and greatly enhances those features with more flexibility and capability. One and five Shopify sales includes a discount of some sort, and Shopify wants to capitalize.
eBay released APIs: the Feed API and the Deal API. The Feed API allows sellers to download order reports and acknowledge fulfilled orders. To do this, sellers upload input files and download reports, both as output files. The new APIs arrive as eBay celebrates the 20th birthday of its dev program.
Changes are coming to the recently launched eBay Buy and Sell APIs. These changes include category name length increase, schedule changes for required product identifiers, and bidder privacy changes in the eBay Trading API. eBay will be implementing these changes in the coming months.