Application Programming Interface (API) has been largely used in most of the technology platforms available in the market nowadays. It has become vital for a business to utilize the capabilities of an API in integrating various systems they have in place. In this study, the author proposes an automatic integration of two widely used systems in the Facility Management industry, the CAFM and ERP software using API. The development of the new system model has been analyzed using various systems analysis tools such Root cause Analysis, Use Cause Diagram, HIPO Chart and Swimlane Workflow Diagrams. The project has proven to be highly beneficial for the company because can offer reduction in IT expenses, reduction in time required to complete tasks within the system and can deliver better data integrity and reliability.