The Homeless Resource Hotline is a toll-free number (877-231-6067) that provides up-to-date information on available resources for the homeless in Boston, allowing them to find places to get meals and safely spend the night. The hotline was built using Twilio, Google App Engine, and Google Calendar, which makes it easy to expand to other cities by pointing the app to new calendar sources. With $500 in Twilio credit, the developers plan to spread the word about the hotline to volunteers and local organizations, as well as reach out to homeless organizations in New York City and San Francisco to expand the service there. The application was built over two days, with the most challenging part being populating the calendar with relevant information. The use of Twilio's API has been found to be simple and user-friendly, making it easy for developers to build such applications.