What is one important outcome expected from API testing?

One important outcome expected from API testing is ensuring that the API is functioning as expected. This involves validating that the API's endpoints behave correctly, returning the expected responses for various inputs, and adhering to the specified business logic. Effective API testing confirms that the integration points between different systems communicate properly and handle data accurately, which is critical for maintaining system reliability and performance.

By ensuring that the API operates as intended, organizations can identify issues early in the development process, reduce the potential for bugs in production, and enhance overall user experience. This assurance directly contributes to the trust that consumers and systems can place in the API, supporting more robust integration solutions.

While reducing costs, increasing adoption, and enhancing user interface design are beneficial aspects of API management and development, they do not directly relate to the primary purpose and outcome of API testing itself. The focus of API testing is fundamentally on validating functionality, which is crucial for achieving the other positive business outcomes in the long run.