API Integration Barriers in Case-Based Process Management: A Review of Interoperability and Real-Time Response Constraints Outline

The importance of a fluent and responsive incorporation of API in contemporary undertakings has been on the rise due to the rising popularity of Case-Based Process Management (CBPM). In contrast to the conventional types of workflows, the system of CBPM demands real-time decisions, the orchestration of tasks that are highly sensitive to the existence of robust communication among disparate components. Nevertheless, current organizations still experience considerable integration impediments, including semantic and syntax interoperability concerns, architectural vulnerability, and governance deficiency, which erode the scalability and robustness of such systems. The paper reflects the Systematic Literature Review (SLR) of 16 peer-reviewed articles of the 2017-2025 period to define and summarize the principal challenges of API integration in the CBPM setting. The work is analyzed across several areas, such as healthcare, FinTech, the public sector, and enterprise IT, and identifies five key themes: interoperability obstacles, real-time responsive issues, barriers, architectural difficulties, workflow entanglement, and documentation inadequacy. Along with the identification of the thematic trends, the review provides several practical suggestions, including the concept of contract-first API design, the implementation of middleware, semantic standardization, asynchronous processing, and, finally, centralized governance frameworks. The qualitative insights are supplemented by visual analyses such as a PRISMA diagram, bibliometric mappings, and a domain-based synthesis graph. Through a synthesized perspective of the integration landscape, this work benefits the researcher in that they can have an overview decision-making point, and the practitioner in that the work gives them some practical solutions on how to go about constructing scalable, interoperable, and future-proofed CBPM systems.