This document summarizes a presentation on how to improve APIs by focusing on the developer experience. The presentation outlines four simple rules for better APIs: 1) Give developers reasons to build on the API, 2) Make developers successful faster, 3) Don't violate developers' trust, and 4) Listen to developers. It discusses common frustrations developers have such as a lack of purpose or documentation, difficulty getting started, and lack of support. The presentation urges API providers to put themselves in developers' shoes and treat them and their APIs as products to improve adoption.