Google Wallet Instant Buy allows merchants to store and access customer payment data in the cloud. Both the Instant Buy for Android and Instant Buy for web versions offer in-app or online payments, access to Google single sign-on, and streamlines user experience by keeping data entry to a minimum. The APIs work with the merchants' current payment systems, and are available for use by end users in the U.S. who already have Google Wallet accounts.
Interested developers or merchants should contact Google at http://getinstantbuy.withgoogle.com/.
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18-07-16 09:06:58Updated docs url
04-08-15 10:57:49[Sample Source Code] Google Wallet API Tutorial by Google updated with Related API Google Wallet Instant Buy