Understanding Types and Trade-Offs

API generators automate various aspects of API development, from generating code to creating documentation. The article categorizes generators into description generators (producing API descriptions from data sources, models, or server code) and description-driven generators (creating server/client code, tests, or documentation from API descriptions). The choice of generator depends heavily on the development approach: design-first workflows favor server code generation from descriptions, while code-first approaches use description generation from server code. Not all generator types are recommended—generating descriptions directly from data sources should be avoided. While generators can improve development speed and consistency, they require careful tool selection and developer understanding of API description quality. Generators are tools to facilitate maintainable interfaces, not substitutes for thoughtful API design.