API Design is the practice of creating software interfaces that enables interaction between different software systems. Coursera's API Design catalogue guides you through the principles of designing and building effective APIs. You'll learn to create robust, user-friendly APIs that enable software systems to communicate efficiently. You'll delve into RESTful API design, GraphQL, and other popular API paradigms, understand API security, versioning, documentation, and testing procedures. This skill will empower you as a software developer, product manager, or solution architect, providing you with the knowledge to create and manage APIs that enhance software interoperability.