Foreword
We live in a connected world where virtually every aspect of our lives is choreographed by technology. Our mobile devices interface with the Internet of Things to monitor our health and provide real-time weather updates, which in turn connects us with friends to compete against during morning runs or share information with through crowdsourced weather networks. Businesses then access this information to deliver more relevant offers, such as the perfect pair of running shoes based on wear and weather conditions. Finally, companies may share this information across their ecosystems to better inform supply chain decisions.
These interactions are enabled by application programming interfaces (APIs), which have become the fabric of modern communication and a business currency so powerful they are reshaping the business world. Fundamentally, an API is an interface. In the same way that most applications have user interfaces to support human interactions, APIs are the interface that applications expose to facilitate interactions with other applications. APIs have existed since the first computer programs were developed, but the original APIs were rigid and required strict adherence to proprietary programming structures. In the early 2000s, web-connected APIs, including Amazon’s Store API, eBay, and Salesforce, transformed the landscape and created a new network of open web APIs that anyone could consume. Since then, APIs have evolved from rigid interfaces to flexible and declarative ...
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