Now our Consumer Wallet app shows real-time balance for linked cards issued by third-party banks. In the nearest future we’ll make this balance available for in-app bill payments, mobile phone top-ups and other transactions.
The feature is currently designed for closed-loop payment schemes, if you wish to implement it for an open-loop system it will require some modification and additional product development. Please let us know and it will be planned for the next release.

App users can add third-party bank cards to their wallet and see their balance, which may be used as a top-up source