A headless CMS is a Content Management System that exposes information through an API, allowing it to be accessed from different devices and platforms. A headless CMS is designed to store and expose organized, structured content without concern over where and how it's going to be presented to users. This decoupling of presentation and storage offers several advantages, including the ability to reuse the same content on other platforms. In this article, a Strapi backend was created for a pet adoption application, using a headless CMS approach with React and Context API for the frontend. The application allows users to create, read, update, and delete pets, with features such as adding new pets, editing existing ones, and deleting them altogether. The code is available on GitHub, showcasing how a headless CMS can be used in a typical CRUD application.