This document discusses strategies for making an API a first-class citizen. It provides lessons learned from JustGiving's experience growing API adoption among charities. Some key points include: choosing a major launch partner to validate the API; being prepared for a slow adoption process requiring support; and making the API easy to use through documentation, sandboxes, and community support. Internal "dog-fooding" or using the API within the company provides benefits like faster experimentation, wider API knowledge, and easier development of new products. The document advocates continuing to support innovation through hackathons and meetups to promote tech for good causes and further growing the API ecosystem.