NoteOperator is a Markdown workspace designed for both humans and AI agents. It allows users to write Markdown notes, share documents via a single link, and export them to PDF. A key feature is its built-in support for the Model Context Protocol (MCP), enabling users to create scoped API keys for AI agents like Claude or Cursor to safely access and edit documents. This provides a middle ground between simple text files and more complex platforms like Notion, offering a focused writing experience with advanced AI integration capabilities. The platform is free with no limits.