The drawio-mcp-server exposes Draw.io/diagrams.net functionality as MCP tools that AI agents can invoke. It provides document management, page operations, diagram import/export (XML, SVG, PNG, Mermaid), and multi-agent concurrency support through per-document serialization. The server runs either locally or with TLS and communicates via the MCP protocol to let AI systems programmatically create and manipulate diagrams.