This repository is a static website built with Gatsby that serves as a community-maintained directory of iOS apps supporting x-callback-urls. The site is generated from JSON data files describing each app's available URL actions, parameters, and metadata. The architecture is a standard Gatsby static site with React components, CSS modules, and a GraphQL data layer. The primary entry point is the index page which lists all apps with their actions. The codebase is well-organized with clear separation of concerns, but uses outdated dependencies (Gatsby v3, React 17, deprecated babel-eslint) and lacks automated tests or CI/CD pipelines. It is a straightforward, functional application for documenting iOS URL schemes.