ReadMe's API explorer faced challenges in supporting complex JSON Schema structures due to its origins when Swagger/OAS usage was limited, requiring API creation within their Dashboard. Despite this, it remains a popular method for documenting endpoints, allowing direct uploads of Swagger and OAS files to document API parameters, including various nested and primitive structures. Initially, the explorer struggled with deep nesting, arrays of primitives, and top-level values, leading to issues in rendering and input forms. However, recent updates have improved support for deeply nested objects, better handling of primitive arrays with appropriate input elements, and support for top-level arrays and primitives. The API Explorer is now open source, inviting users to report unsupported types and explore its capabilities further.