The MCP Outline Server is a Model Context Protocol server designed to work with an Outline knowledge base for comprehensive document management. It exposes MCP tools to perform document operations (search, read, create, edit, archive), manage collections and their hierarchical structure, and collaborate through threaded comments. It also supports backlinks discovery to identify documents that reference a given document. Direct content and metadata access is provided via MCP Resources URIs (outline://document/{id}, outline://collection/{id}, etc.), enabling lightweight integrations with clients. The server implements automatic rate limiting with header-based tracking and exponential backoff retry, easing API usage across multiple clients. Transport modes include stdio for local use, SSE for web clients, and streamable-http for remote access. Access control is configurable: enabling read-only mode disables all write operations; there is also an option to disable delete operations while permitting create and update workflows. It requires an Outline API key and can connect to cloud-hosted or self-hosted Outline instances via configurable API URL. The project includes deployment guidance for uv-based execution and Docker, and supports common MCP client environments (Claude, Cursor, VS Code, Cline) with development and testing tooling.