I have a page in my Web application where I generate coupons for my users (simple pictures with a logo and a discount code). How do I go about implementing a feature where (after they click on a link in the browser, say) the coupon gets added to their Google Wallet?
I assume my web page should call into a Google API (somehow passing in the image of the coupon) but I can't find the API in question. The examples I see are from an Android application perspective. My application is a web application (though run on an Android phone).
You can use the Wallet Rest API. See the documentation for Offer pass type.