The PayPal Invoicing Ruby SDK by PayPal allows developers to integrate the PayPal Invoicing API's methods for creating and managing invoices into their Ruby projects and applications. Code examples and sample applications are provided in the documentation.
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.
Cashplus continues to add to its Fintech API suite. Most recently, the company released its Payments API. The API enables small and medium sized business to initiate, approve, reject and submit payments from third party applications. The API can process thousands of transactions simultaneously.