Centralized Customer Database and Card Linking Technology

Thank you Bryan and Brian for answering my questions so thoroughly.

I recently came across a business/app using card-linking technology to reward their app users with loyalty points when they purchase products at a business on the app. There are hundreds of businesses on this app.

I believe this business was/is using Fidel API’s Select Transactions API to reward loyalty points based on the transaction amount. However, Fidel said they are pausing this feature and not allowing any more businesses to begin using it until further notice.

That said, I was hoping to do something similar for the businesses I service that use Square as their POS.

Is it possible to use the Square web payments SDK to store/save a user’s card details, and when they use their saved card at one of the businesses I service that uses a Square POS, I can receive the webhook information containing the transaction details?