Visio MCP Server

The Office‑Visio‑MCP‑Server bridges the gap between conversational AI assistants and Microsoft Visio, a cornerstone of diagramming in many business workflows. By exposing a simple JSON‑based API over the MCP protocol, it allows an assistant to create, edit, and export Visio diagrams without any direct user interaction with the desktop application. This capability is especially valuable for developers building automation pipelines, knowledge‑base visualizers, or interactive design tools that need to generate complex flowcharts, org charts, or network diagrams on demand.

At its core, the server harnesses Windows’ COM interface to control Visio programmatically. It can instantiate new diagrams from templates, open existing files, and perform fine‑grained shape manipulation—adding rectangles, circles, connectors, or custom shapes; positioning them with precise coordinates and dimensions; attaching text labels; and listing all elements for further processing. The server also supports file operations such as saving to disk, exporting diagrams as raster images, and safely closing documents. These actions are exposed through straightforward JSON payloads, making the integration with any MCP‑compliant AI client seamless.

Key features include:

• File lifecycle management: Create, open, save, export, and close Visio documents with a single API call.
• Shape orchestration: Add diverse shape types, connect them using various connector styles, and annotate with text.
• Introspection: Retrieve a complete list of shapes in a diagram, enabling AI agents to reason about the structure before making modifications.
• Cross‑platform convenience: While Visio itself is Windows‑only, the server can run on any machine with Visio installed and expose its functionality to remote clients over MCP, decoupling the AI workflow from local UI constraints.

Real‑world use cases abound. A project management assistant could automatically generate Gantt charts or sprint boards from task data; a technical writer might produce architecture diagrams directly from code comments; and an enterprise chatbot could create process flowcharts on demand when a user requests a visual explanation. By embedding the server into an MCP‑based workflow, developers can treat diagram generation as a first‑class capability alongside other data retrieval or transformation tools.

What sets this MCP server apart is its tight coupling to the native Visio ecosystem. Unlike generic SVG or canvas libraries, it preserves full fidelity with Visio’s shape library, connector logic, and export options. This means the diagrams produced are instantly usable in existing Microsoft Office workflows—ready for inclusion in PowerPoint decks, Word reports, or SharePoint sites—without any manual conversion. For developers looking to enrich AI assistants with powerful visual output, the Office‑Visio‑MCP‑Server delivers a robust, low‑overhead bridge to Microsoft’s industry‑standard diagramming platform.