The text discusses the benefits and challenges of integrating with multiple Human Resources Information Systems (HRIS) using public APIs versus a Unified API like Merge. It highlights the complexity and time-consuming nature of using individual HRIS APIs due to variations in protocols, authentication methods, and data formats across platforms like Workday and BambooHR. In contrast, Merge's Unified API simplifies this process by providing a single programming interface, standardized data schemes, and unified endpoints, which reduces development time, complexity, and maintenance costs while improving security and performance. The article explains how Merge facilitates integration with over fifty HRIS APIs, offering a streamlined method for accessing employee data, and emphasizes the advantages of using Merge to handle integrations with various systems beyond HRIS, such as accounting and marketing platforms.