This document discusses extending the programmability of Apigee Edge using Node.js. It introduces Node.js and related tools like Volos and Argo that can be used to build APIs. Volos provides modules for API management features like OAuth, quota, and caching. APIs built with these tools can be deployed directly to Apigee Edge. The document includes demos of building a simple API and using Volos for OAuth authorization. Resources for further information on Node.js development with Apigee are also listed.