The Yandex Money PHP SDK by Yandex is the official PHP 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. Yandex is an Internet company and the largest Russian search engine.
Here is an interview with Amber Feng, software engineer for a leading payment API on the web, Stripe. In this interview we will discuss Stripe security and dealing with multiple currencies. Check out our Stripe API profile.
Square now has an E-commerce API that brings Square services to third party websites. Square is usually associated with its mobile credit card reader and complementary software. With the E-commerce API, merchants can use their own systems with all the benefit of Square's modern payment services.