[This API is no longer available and this page is being maintained purely for historical and research purposes.]
Leaf is a platform that allows merchants and their customers to interact. Leaf provides merchants with tools to collect payments from their customers and ask for feedback. Leaf provides customers with an application to retrieve receipts and give feedback to merchants.
The Leaf API allows developers to access and integrate the functionality of Leaf with other applications and to create new applications. Public documentation is not available; interested developers should sign up here: http://leaf.me/developers.