Web APIs are everywhere. Just browse any technology news website and you are likely to read something about the latest product launching an open API. Companies are making huge investments in providing APIs to internal developers, partner organizations, and public developers. APIs that were once used to solve integration problems have now become the backbone for an organization’s digital strategy. With this practical guide, developers, architects, and tech leads will learn how to navigate complex decisions for designing, scaling, marketing, and evolving interoperable APIs. It explains API design theory and provide hands-on exercises for building your web API and managing its operation in production.