This eBay PHP library interacts with finding API, shopping API, and trading API. Tutorials to work with the three APIs include find best price and keywords for the finding API; retrieve information about a seller and affiliate parameters for the shopping API; and listing & bidding auctions for the trading API. Created by developer Rick Earley.
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.
Stage of Life, loyalty marketing agency, has launched its Coupon API. The API pulls from the Stage of Life Merchant Network. The network includes hundreds of national brand merchant offers, coupons, and discounts. Access through the API gives developers the flexibility to enhance current loyalty programs, or build stand alone applications.