Best API documentation platforms with MDX and component support (March 2026)

Modern API documentation has evolved beyond static Markdown files, integrating dynamic features such as MDX (Markdown with JSX) to enable interactive and component-based documentation. Developers now expect documentation tools that support MDX alongside React components to enhance interactivity and align with product interfaces. The text compares different API documentation platforms that cater to these needs, highlighting their support for MDX, component libraries, and automated API reference generation. Fern is noted for its comprehensive integration of MDX with API workflows, allowing for embedded React components and automated API documentation from specifications, thereby reducing the risk of content drift. Other tools like Mintlify, Fumadocs, GitBook, and ReadMe offer varying degrees of MDX support and component integration, but they may lack the full synchronization with API specifications that Fern provides. The need for MDX support in API documentation is emphasized, along with the importance of automated reference generation to keep documentation aligned with evolving API behavior.