Google Wallet is a mobile payment system developed by Google that allows its users to store debit cards, credit cards, loyalty cards, and gift cards , as well as redeeming sales promotions on their mobile phone. Google Wallet comes with 24/7 fraud monitoring as part of Google Wallet Fraud Protection in the US. You can easily disable your Wallet app or card from your Google Wallet account if they’re ever lost or stolen. In Google wallet app you’ll find sections such as transaction tracking including even the location, Google Offers, reward cards, payment cards, PIN Protect along-with a drop down menu for settings, help, about , “Contact Us” and sending feedback.
Yes, the PayPals Rest API can be used by Merchant in 202 countries. It covers most of the countries and to be sure you may look up for your country here: https://www.paypal.com/us/webapps/mpp/country-worldwidePayment Gateways (US) PayPal