API Contracts
API contracts are formal specifications that define the structure, behavior, and requirements of an API, ensuring consistent communication between client and server applications. They typically include details such as endpoints, request/response formats, data types, authentication methods, and error handling. By serving as a shared agreement, they enable teams to develop, test, and integrate APIs independently while reducing integration errors.
Developers should learn and use API contracts to improve collaboration, reduce bugs, and streamline API development in distributed systems or microservices architectures. They are essential for scenarios like building scalable web services, ensuring backward compatibility, and automating testing and documentation, as they provide a single source of truth that all stakeholders can reference.