Future-proof banking systems through use of Open API. Connectors will bridge the services published in Open API and the legacy systems which do not. This simplifies integration complexity with external parties.
For banks that have successfully centralised control of APIs, the next step would be to monetise API usage. API specifications can be written in YAML or JSON. The format is easy to learn and readable to both humans and machines. APIs may be used by both developers inside the organisation that published the API or by any developers outside that organisation who wish to register for access to the interface.