API Blueprint

API Blueprint is a powerful high-level API description language for web APIs. It is simple and accessible to everybody involved in the API lifecycle. Its syntax is concise yet expressive. With API Blueprint you can quickly design and prototype APIs to be created or document and test already deployed mission-critical APIs. It is built to encourage dialogue and collaboration between project stakeholders, developers and customers at any point in the API lifecycle. API Blueprint is completely open sourced under the MIT license. Its future is transparent and open. API Blueprint is built to encourage better API designs through abstraction. The goal of API Blueprint is to decouple elements of API to enable modularity while encapsulating backend implementation behavior. API Blueprint is all about the design-first philosophy. Similar to tests in test-driven development, API Blueprint represents a contract for an API. Discussing your API and settling on the contract before it is developed tends to lead to better API designs. Once your API Blueprint is in place everybody can test whether the implementation is living up to the expectations set in the contract. Thanks to its broad adoption there is a plethora of tools built for API Blueprint. From various standalone tools such as mock server, documentation and testing tools to full-featured API life-cycle solutions.