Application programming interface (API)

APIs act as intermediaries, defining how different software components should interact. They expose specific functionalities of a system to other systems, hiding the underlying complexity and implementation details. For example, a weather API allows developers to access weather data without needing to build their own weather data infrastructure. APIs typically involve requests and responses, where one application requests a service or data from another, and the second application responds with the requested information or performs the requested action. APIs are crucial for building modular, scalable, and interconnected software systems, fostering innovation by enabling developers to easily leverage existing functionalities and data sources. In the context of AI, APIs are commonly used to access pre-trained models, cloud-based AI services (e.g., image recognition, natural language processing), and data sources for training and inference.