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MCP Office Interop Word Server

by mario-andreschak

Automation/System & WebMicrosoft WordCOM InteropAutomationTypeScript

This project implements a Model Context Protocol (MCP) server that allows interaction with Microsoft Word documents using COM Interop on Windows. It provides MCP tools to perform common Word processing tasks programmatically.

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MCP Office Interop Word Server

This project implements a Model Context Protocol (MCP) server that allows interaction with Microsoft Word documents using COM Interop on Windows.

It provides MCP tools to perform common Word processing tasks programmatically.

Features

  • Wraps common Microsoft Word operations via COM Interop (winax).
  • Exposes functionality as MCP tools.
  • Supports both stdio and sse transports for MCP communication.
  • Built with TypeScript and uses the @modelcontextprotocol/sdk.

Prerequisites

  • Node.js (v18 or later recommended)
  • npm
  • Microsoft Word installed on a Windows machine.

Installation

  1. Clone the repository or download the source code.
  2. Navigate to the project directory in your terminal.
  3. Install dependencies: 
    npm install

Building

To compile the TypeScript code to JavaScript:

npm run build

This will output the compiled files to the dist directory.

Running the Server

The server can run using two different MCP transports: stdio or sse.

stdio Transport

This is the default mode. It's suitable for local clients that communicate via standard input/output.

npm start

or

node dist/index.js

Connect your MCP client (e.g., MCP Inspector) using the stdio method, pointing to the node dist/index.js command.

SSE (Server-Sent Events) Transport

This mode uses HTTP and Server-Sent Events, suitable for web-based or remote clients.

PowerShell:

$env:MCP_TRANSPORT="sse"; npm start

Bash / Cmd:

MCP_TRANSPORT=sse npm start

The server will start an HTTP server, typically on port 3001 (or the port specified by the PORT environment variable).

  • SSE Endpoint: http://localhost:3001/sse
  • Message Endpoint (for client POSTs): http://localhost:3001/messages

Connect your MCP client using the SSE method, providing the SSE endpoint URL.

Available Tools

The server exposes the following tools (tool names are prefixed with word_):

Document Operations:

  • word_createDocument: Creates a new, blank Word document.
  • word_openDocument: Opens an existing document.
    • filePath (string): Absolute path to the document.
  • word_saveActiveDocument: Saves the currently active document.
  • word_saveActiveDocumentAs: Saves the active document to a new path/format.
    • filePath (string): Absolute path to save to.
    • fileFormat (number, optional): Numeric WdSaveFormat value (e.g., 16 for docx, 17 for pdf).
  • word_closeActiveDocument: Closes the active document.
    • saveChanges (number, optional): WdSaveOptions value (0=No, -1=Yes, -2=Prompt). Default: 0.

Text Manipulation:

  • word_insertText: Inserts text at the selection.
    • text (string): Text to insert.
  • word_deleteText: Deletes text relative to the selection.
    • count (number, optional): Number of units to delete (default: 1). Positive=forward, negative=backward.
    • unit (number, optional): WdUnits value (1=Char, 2=Word, etc.). Default: 1.
  • word_findAndReplace: Finds and replaces text.
    • findText (string): Text to find.
    • replaceText (string): Replacement text.
    • matchCase (boolean, optional): Default: false.
    • matchWholeWord (boolean, optional): Default: false.
    • replaceAll (boolean, optional): Default: true.
  • word_toggleBold: Toggles bold formatting for the selection.
  • word_toggleItalic: Toggles italic formatting for the selection.
  • word_toggleUnderline: Toggles underline formatting for the selection.
    • underlineStyle (number, optional): WdUnderline value (default: 1=Single).

Paragraph Formatting:

  • word_setParagraphAlignment: Sets paragraph alignment.
    • alignment (number): WdParagraphAlignment value (0=Left, 1=Center, 2=Right, 3=Justify).
  • word_setParagraphLeftIndent: Sets left indent.
    • indentPoints (number): Indent value in points.
  • word_setParagraphRightIndent: Sets right indent.
    • indentPoints (number): Indent value in points.
  • word_setParagraphFirstLineIndent: Sets first line/hanging indent.
    • indentPoints (number): Indent value in points (positive=indent, negative=hanging).
  • word_setParagraphSpaceBefore: Sets space before paragraphs.
    • spacePoints (number): Space value in points.
  • word_setParagraphSpaceAfter: Sets space after paragraphs.
    • spacePoints (number): Space value in points.
  • word_setParagraphLineSpacing: Sets line spacing.
    • lineSpacingRule (number): WdLineSpacing value (0=Single, 1=1.5, 2=Double, 3=AtLeast, 4=Exactly, 5=Multiple).
    • lineSpacingValue (number, optional): Value needed for rules 3, 4, 5.

Table Operations:

  • word_addTable: Adds a table at the selection.
    • numRows (number): Number of rows.
    • numCols (number): Number of columns.
  • word_setTableCellText: Sets text in a table cell.
    • tableIndex (number): 1-based table index.
    • rowIndex (number): 1-based row index.
    • colIndex (number): 1-based column index.
    • text (string): Text to set.
  • word_insertTableRow: Inserts a row into a table.
    • tableIndex (number): 1-based table index.
    • beforeRowIndex (number, optional): Insert before this 1-based row index (or at end if omitted).
  • word_insertTableColumn: Inserts a column into a table.
    • tableIndex (number): 1-based table index.
    • beforeColIndex (number, optional): Insert before this 1-based column index (or at right end if omitted).
  • word_applyTableAutoFormat: Applies a style to a table.
    • tableIndex (number): 1-based table index.
    • formatName (string | number): Style name or WdTableFormat value.

Image Operations:

  • word_insertPicture: Inserts an inline picture.
    • filePath (string): Absolute path to the image file.
    • linkToFile (boolean, optional): Default: false.
    • saveWithDocument (boolean, optional): Default: true.
  • word_setInlinePictureSize: Resizes an inline picture.
    • shapeIndex (number): 1-based index of the inline shape.
    • heightPoints (number): Height in points (-1 or 0 to auto-size).
    • widthPoints (number): Width in points (-1 or 0 to auto-size).
    • lockAspectRatio (boolean, optional): Default: true.

Header/Footer Operations:

  • word_setHeaderFooterText: Sets text in a header or footer.
    • text (string): Text content.
    • isHeader (boolean): True for header, false for footer.
    • sectionIndex (number, optional): 1-based section index (default: 1).
    • headerFooterType (number, optional): WdHeaderFooterIndex value (1=Primary, 2=FirstPage, 3=EvenPages). Default: 1.

Page Setup Operations:

  • word_setPageMargins: Sets page margins.
    • topPoints (number): Top margin in points.
    • bottomPoints (number): Bottom margin in points.
    • leftPoints (number): Left margin in points.
    • rightPoints (number): Right margin in points.
  • word_setPageOrientation: Sets page orientation.
    • orientation (number): WdOrientation value (0=Portrait, 1=Landscape).
  • word_setPaperSize: Sets paper size.
    • paperSize (number): WdPaperSize value (e.g., 1=Letter, 8=A4).

Notes

  • This server requires Microsoft Word to be installed and accessible via COM Interop on the machine where the server runs.
  • Error handling for COM operations is basic. Robust production use might require more detailed error checking and recovery.
  • Word object model constants (like WdSaveFormat, WdUnits, etc.) are represented by their numeric values in the tool arguments. You may need to refer to the Word VBA documentation for specific values.