A real-time electronic bill presentment and payment system of a bill presentment and payment system (BPPS) provider is exposed to at least one of a business financial institution and an accounting software provider via an API. The BPP provider facilitates the institution or software provider providing a real-time electronic bill presentment and payment mobile application to a business. The BPPS obtains, via the API, from the institution or software provider, registration information relevant to the business. The real-time system populates a biller directory database with the registration information. No action, other than the facilitating, is required by the BPPS provider for the institution or software provider to obtain the registration information. In some instances, provision is made for loss of connectivity between the institution or software provider and the business and/or for alerts to the business.