The Alexa Skill Management API provides RESTful HTTP interfaces for programmatically performing Alexa skill management tasks like creating a new skill or updating an interaction model. The API authenticates the caller through the Login with Amazon and allows developers to build tools or services that can create and update Alexa skills on behalf of their users. Developers can programmatically manage and test their skills with the Alexa Skill Management API (SMAPI) tool builders to manage and test Alexa skills and related resources such as interaction models. Alexa provides a way to create, update and test your Alexa skills from the command line interface and build voice experiences for your services and devices. Alexa is the voice service that powers Echo and provides a set of built-in abilities, or skills, that enable customers to interact with devices in a more intuitive way using voice commands. Amazon.com, Inc., is an American electronic commerce and cloud computing company that is one of the largest Internet-based retailer in the world by total sales and market capitalization.