Application Programming Interfaces (APIs) have transformed the way mobile and web applications communicate, allowing developers to streamline the software development process by avoiding redundant coding for common functionalities. APIs act as the key integration points for modern technologies, facilitating interactions between different programs through defined protocols, and require endpoints to access server resources. To aid developers in finding APIs, various online platforms, including API marketplaces like RapidAPI and API directories like ProgrammableWeb, aggregate and categorize APIs by industry. These resources provide developers with tools such as code snippets, testing environments, and documentation to simplify API integration and usage. While API marketplaces allow for the submission, consumption, and monitoring of APIs, directories primarily serve as repositories for discovering new APIs.