The PayPal Express Checkout Ruby SDK by PayPal is a gem that allows developers to integrate the PayPal Express Checkout API into their Ruby applications. Rails 4+ is not supported due to backward compatibility concerns.
Mocapay focuses on mobilizing businesses' payment, loyalty, coupon, and gift programs through innovative software. Mocapay aims to unify merchant programs and payment options across all devices. To enhance its platform, Mocapay recently launched a token solution that integrates with any POS system via an API.
Hyperwallet revealed that its REST payout API has moved from public beta to full public availability. The announcement coincides with the launch of new Hyperwallet developer features, including software development kits (SDKs), additional API calls, and a bolstered self-serve developer portal.