Service Spotlight: The Phone.com API APIs, or Application Programming Interface, are a building block of communication between various software components. API is a broad term that refers to a communications protocol that can be accessed to extend, expand or in some way better services. Insider Insights: You don’t have to be a “techie” or a developer to make APIs work for you, your team, your communications, your technology and your work. Companies like Phone.com provide customers with the API tools and information they need. An API is like a “toolbox of opportunities” for small operations looking to do big things. APIs