Bandwidth offers a comprehensive suite of messaging API solutions that enable businesses to send messages from various types of numbers, supported by reliable delivery through established carrier relationships. The article provides a detailed guide on using Bandwidth’s Voice and Messaging APIs with its Ruby SDK, including installation and configuration of necessary gems, initializing the SDK client, and coding examples for sending SMS and making phone calls. It explains how to set up a server to handle callbacks and webhooks for message delivery confirmation and call actions, and highlights the need to customize variables for specific account settings. Additionally, readers are directed to further resources, including a webinar and developer tools, for deeper exploration of Bandwidth’s capabilities and a free trial offer for hands-on experience.