Digital platforms have contributed enormously to the success of businesses. Whereas the Information Systems literature is dominated by digital platform research, less is mentioned about Application Programming Interfaces (APIs), the fiber that connects digital platforms. Critically, the normative literature seems to be silent on how developing economy firms achieve agility through API integration. In addressing these research gaps, this research seeks first to investigate how developing economy firms achieve agility when they integrate APIs. Furthermore, the study aims to understand which forms of institutional forces enable or hinder the API integration process. Philosophically, this study will be approached from a critical realist perspective and will adopt a qualitative method of inquiry.