Google last week released an API that enables iOS app developers to integrate Google Wallet Instant Buy as a checkout option, according to a press release.

Google worked with select merchants at first to add Instant Buy to their mobile apps, including B&H, Eat24, Fancy, Newegg, Sionic Mobile and Wish, according to the press release. Instant Buy was already available as an option for merchants with Andriod apps and mobile websites.