The Twilio Node.js Helper Library allows developers to access Twilio's voice, SMS, and VoIP functions using Node.js code. The library is available as an npm package, and quickstart tutorials are available to get developers started.
With huge budgets spent on marketing, it's probably a good idea to keep track of which marketing avenues are working and which aren't. Call Tracking Metrics is a simple telephone call tracking service that aims at helping users link incoming calls to specific marketing campaigns and in so doing, easily track and analyze the amount of calls received due to that particular campaign. The Call Tracking Metrics API provides access to this functionality.