Excel MCP Server

Excel MCP Server

A Model Context Protocol (MCP) server that reads and writes MS Excel data.

Features

• Read/Write text values
• Read/Write formulas
• Create new sheets

🪟Windows only:

• Live editing
• Capture screen image from a sheet

For more details, see the tools section.

Requirements

• Node.js 20.x or later

Supported file formats

• xlsx (Excel book)
• xlsm (Excel macro-enabled book)
• xltx (Excel template)
• xltm (Excel macro-enabled template)

Installation

Installing via NPM

excel-mcp-server is automatically installed by adding the following configuration to the MCP servers configuration.

For Windows:

{
    "mcpServers": {
        "excel": {
            "command": "cmd",
            "args": ["/c", "npx", "--yes", "@negokaz/excel-mcp-server"],
            "env": {
                "EXCEL_MCP_PAGING_CELLS_LIMIT": "4000"
            }
        }
    }
}

For other platforms:

{
    "mcpServers": {
        "excel": {
            "command": "npx",
            "args": ["--yes", "@negokaz/excel-mcp-server"],
            "env": {
                "EXCEL_MCP_PAGING_CELLS_LIMIT": "4000"
            }
        }
    }
}

Installing via Smithery

To install Excel MCP Server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @negokaz/excel-mcp-server --client claude

Tools

`excel_describe_sheets`

List all sheet information of specified Excel file.

Arguments:

• fileAbsolutePath
  • Absolute path to the Excel file

`excel_read_sheet`

Read values from Excel sheet with pagination.

Arguments:

• fileAbsolutePath
  • Absolute path to the Excel file
• sheetName
  • Sheet name in the Excel file
• range
  • Range of cells to read in the Excel sheet (e.g., "A1:C10"). [default: first paging range]
• showFormula
  • Show formula instead of value [default: false]
• showStyle
  • Show style information for cells [default: false]

`excel_screen_capture`

[Windows only] Take a screenshot of the Excel sheet with pagination.

Arguments:

• fileAbsolutePath
  • Absolute path to the Excel file
• sheetName
  • Sheet name in the Excel file
• range
  • Range of cells to read in the Excel sheet (e.g., "A1:C10"). [default: first paging range]

`excel_write_to_sheet`

Write values to the Excel sheet.

Arguments:

• fileAbsolutePath
  • Absolute path to the Excel file
• sheetName
  • Sheet name in the Excel file
• newSheet
  • Create a new sheet if true, otherwise write to the existing sheet
• range
  • Range of cells to read in the Excel sheet (e.g., "A1:C10").
• values
  • Values to write to the Excel sheet. If the value is a formula, it should start with "="

`excel_create_table`

Create a table in the Excel sheet

Arguments:

• fileAbsolutePath
  • Absolute path to the Excel file
• sheetName
  • Sheet name where the table is created
• range
  • Range to be a table (e.g., "A1:C10")
• tableName
  • Table name to be created

`excel_copy_sheet`

Copy existing sheet to a new sheet

Arguments:

• fileAbsolutePath
  • Absolute path to the Excel file
• srcSheetName
  • Source sheet name in the Excel file
• dstSheetName
  • Sheet name to be copied

`excel_format_range`

Format cells in the Excel sheet with style information

Arguments:

• fileAbsolutePath
  • Absolute path to the Excel file
• sheetName
  • Sheet name in the Excel file
• range
  • Range of cells in the Excel sheet (e.g., "A1:C3")
• styles
  • 2D array of style objects for each cell. If a cell does not change style, use null. The number of items of the array must match the range size.
  • Style object properties:
    • border: Array of border styles (type, color, style)
    • font: Font styling (bold, italic, underline, size, strike, color, vertAlign)
    • fill: Fill/background styling (type, pattern, color, shading)
    • numFmt: Custom number format string
    • decimalPlaces: Number of decimal places (0-30)

Configuration

You can change the MCP Server behaviors by the following environment variables:

`EXCEL_MCP_PAGING_CELLS_LIMIT`

The maximum number of cells to read in a single paging operation.
[default: 4000]

License

Copyright (c) 2025 Kazuki Negoro

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