This document discusses monetizing APIs and summarizes a case study of MapQuest's efforts to do so. It describes how MapQuest transitioned from a premium support model with high prices to a self-service platform with free, paid, and enterprise plans. This allowed them to grow their developer base from 9,693 free users to include 121 paid users. It highlights how partnering with Apigee helped MapQuest automate processes and launch their new platform successfully in only 4 months.