receiving, by an application programming interface (API) gateway of a first application executing on a first server, a first API call for a first API managed by the API gateway, the first API call including information corresponding to authentication of a second application executing on a second server, the second application being authenticated for accessing information via the API gateway of the first application based on the information, the first application and the second application linked to a common account holder;

establishing, responsive to receiving the first API call and authentication of the information, a connection between the first application and the second application;

receiving, by the API gateway of the first application, one or more second API calls to a second API managed by the API gateway, from the second application, the API calls for data associated with the common account holder and maintained by the first application;

transmitting, by the API gateway of first application to the second application, via one or more API responses from the second API, at least a portion of data associated with the common account holder maintained by the first application;

receiving, by the API gateway of the first application from the second application, one or more third API calls to a third API managed by the API gateway, the one or more third API calls including populated form fields for a form associated with the first application, the form fields being populated by the second application using data from the second application and the portion of data received by the second application from the first application; and

generating, by the first application, a new account for the common account holder using the populated form fields received from the second application.