What does business have to do with API design? What will they tell you?

Business plays a key role in API design because an API is an interface through which business logic and data become accessible to external or internal consumers. The business requirements determine which functions and data should be accessible, how they should be structured, and which use cases should be supported.

If you ask the business, they will say that the API should provide convenient, understandable, and secure access to the necessary information and operations, support scalability and flexibility for future changes, and comply with security and regulatory requirements. An API is a tool for implementing business goals, so its design should reflect the real needs of the business and users.