The Checkout.com Get Payment Details Java Sample Code demonstrates how to return the details of the payment with the specified identifier string. If the payment method requires redirection to a third party (e.g., 3D Secure), the redirect URL back to the site will include a cko-session-id query parameter.
Stronghold has released a set of APIs that developers can use to add to apps a variety of payment instruments including Bitcoin, Ethereum, and Lumens. The APIs also allow apps to leverage Stronghold platform capabilities such as generate quotes, trade cryptocurrencies, and get available venues.
Smart2Pay is known as a hub for alternative payment solution providers. Its API offers access to main payment processors that aren't typically top of mind for merchants. Now, the company has launched a Mobile SDK that allows app developers to easily accept payment through WeChat and Alipay.
Dwolla has launched a number of services and APIs in the recent past in an attempt to achieve its goal of "building the ideal API to move money." In an attempt to streamline its various services, Dwolla has repositioned its Access API to act as the umbrella to house all of its payment services.