System and methods are provided for implementing a Unified Integration Pattern (UIP) protocol for centralized handling of data feeds between client systems. In embodiments, a method includes: receiving an authentication Application Program Interface (API) message and data file transfer request for a data transfer event from a sending client system in a network of distinct client systems; authenticating the sending client system based on the authentication API message; uploading a data file from the sending client system based on the authenticating; receiving a notification API message from the sending client system indicating that that uploading of the data file to the computer system is complete; sending the data file to a receiving client system in the network of distinct client systems based on API message and data file request and the notification API message; and sending a notification message to the sending client system regarding the data transfer event.