Systems and methods for secure updating of allocations to user accounts are provided. In one aspect, a system includes one or more computer readable storage mediums having program instructions embodied therewith, and one or more processors configured to cause the system to identify an external institution associated with the future transfers, and initiate, based on the identified external institution, a proxy instance of a software application of the external institution to determine a set of endpoints and a set of the future transfers to the endpoints. The system is further configured to receive a request from a user to change at least one of the set of the endpoints and the set of the further transfers to the endpoints, and use the proxy instance, executing the requested change to at least one of the set of the endpoints or the set of the future transfers to the endpoints.