The Clearent C# Sample Code by Clearent demonstrates how to implement transactions into web services, offering resources to examine request body, convert to HTTP content, send request, and evaluate response.
This week Google announced support of three new APIs in it's upcoming beta release of Chrome 61. These APIs, integrated from existing W3C standards, include the Payment Request API for making payment checkouts easier, the Web Share API for implementing native sharing capabilities and the WebUSB API.
Payment options are not limited to cash, checks, or credit cards anymore. ECommerce and mobile tech have transformed the ways people buy goods and services in the past few years. Driving the new options are APIs. Here's a list of top APIs for Payments, according to traffic on ProgrammableWeb.