The Dwolla Python SDK by Dwolla allows to communicate with the API to implement real time payment features into applications. Installation is available via pip. Sample code presents how to obtain information about a basic account.
Those with Capital One banking or credit card accounts, who also use one of Intuit's many services (e.g. TurboTax, QuickBooks, Mint, etc.) may have an easier time transferring financial data from Capital One to their Intuit service through a new, API-driven partnership recently announced.
The number of services offering real-time APIs is slowly but surely expanding and it looks like we're going to have to add quite a few more. Since the start of the year a new type of service has started to appear--client push services, which help developers include real-time updates in their web apps.