Carma is a rideshare/carpooling app that allows users to find local passengers with similar destinations in order to share a commute and reduce cost and traffic emissions, giving drivers a little bit of cash along the way. The Carma API can be used by developers to create apps and features based on Carma traffic data and driving behaviors. WIth the API, developers can integrate extensive carpooling functionality such as search, matching, trip recording, booking, and messaging. Possible use cases include an app that logs Carma data to motivate carpooling, integration with a mapping app that automatically shows multiple transportation options, carpool matching within an events application, and more. The international Carama service is operational in Austin, Bergen, Cork, San Francisco, Dublin, San Diego, Los Angeles, and other US cities.