JotDown is a comprehensive MCP server developed in Rust, designed to facilitate large language models' interaction with Notion and Markdown book generation. It provides robust tools: a Notion Page Tool for creating or updating pages in Notion, and an mdbook Tool for generating and managing markdown-based books, including chapter structure and navigation. The system supports seamless content updates, structured document creation, and context-aware interactions via MCP support. It requires Rust and Notion API tokens for setup, and can be integrated into various content workflows. Users can automate documentation, maintain knowledge bases, or streamline publishing processes by leveraging JotDown’s capabilities for content creation and management.