This document outlines poor practices that API providers can employ to discourage developers from using their APIs. It discusses making onboarding difficult by providing little context about the API's purpose, not explaining how to use it, requiring lengthy downloads and legal agreements, and offering little to no documentation or support. The goal is to highlight actions that introduce obstacles, slow down the onboarding process, and make the developer experience frustrating in order to reduce engagement and usage of the API. The document is intended to advise API providers on what not to do if they want developers to adopt and utilize their APIs.