The Yandex Money .NET SDK by Yandex is the official .NET implementation by Yandex. This SDK calls the Yandex Money API which provides the developer with an online payment system and allows selling and purchasing of goods and services. Developers need to obtain a unique client ID. Yandex is an Internet company and the largest Russian search engine.
Global payments company Mastercard has announced that it will be opening up its internal blockchain API to developers. According to the company, the API, which is focused on B2B transactions, "Mastercard’s blockchain solution provides a new way for consumers, businesses and banks to transact."
Lemon, mobile wallet app, announced the Lemon API as one component of the Lemonade Platform.Prior to API integration, Lemon users were required to snap photos of their receipts and cards to incorporate the data into the mobile wallet app.
Google has released a Google Card Linked Offers API that allows merchants to drive customer loyalty by providing targeted offers to customers who save their loyalty card to Android Pay. Card Linked Offers are displayed to customers within the loyalty card view of Save to Android Pay.