Provides functionality to import Markdown tables into Excel workbooks, enabling the conversion of structured text data into calculated spreadsheet formats.
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@followed by the MCP server name and your instructions, e.g., "@Excel MCP Servercalculate the total for my expenses in budget.xlsx and return the result"
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Here is a step-by-step guide with screenshots.
Excel MCP Server
A Model Context Protocol (MCP) server for Excel file manipulation with real-time formula calculation.
Why a Formula Engine?
Problem: Both humans and LLMs are inconsistent at math. When an AI writes =SUM(A1:A10) to a spreadsheet, it's just storing a string—the calculation never happens unless Microsoft Excel opens the file.
Solution: This MCP integrates HyperFormula, a headless spreadsheet engine that evaluates formulas in real-time. When you read a cell, you get the calculated result, not just the formula text.
write_cell(wb, "A1", 100)
write_cell(wb, "A2", 200)
write_cell(wb, "A3", "=SUM(A1:A2)")
read_cell(wb, "A3")
→ { calculatedValue: 300, formula: "=SUM(A1:A2)" }This ensures mathematical accuracy for:
Financial calculations
Data aggregations
Report generation
Any workflow where precision matters
Features
No Excel Required - Works with .xlsx files using pure JavaScript
400+ Excel Functions - SUM, AVERAGE, VLOOKUP, IF, and more via HyperFormula
Multi-Workbook - Open and manipulate multiple workbooks simultaneously
Tools (21 total)
Workbook Management
Tool | Description |
| Create new workbook in memory, returns ID |
| Open existing .xlsx file |
| Save workbook to disk |
| Close workbook and free memory |
| List all open workbooks |
Sheet Operations
Tool | Description |
| List all sheets in workbook |
| Add new sheet |
| Remove sheet |
| Rename sheet |
| Get dimensions and metadata |
Cell Operations
Tool | Description |
| Read cell value (returns calculated result) |
| Write value or formula (prefix with |
| Read range of cells |
| Write 2D array to range |
| List columns with headers |
Formula Support
Tool | Description |
| Get raw formula string from cell |
| Force recalculation of all formulas |
Charts & Pivot Tables
Tool | Description |
| Create bar, line, pie, or scatter chart |
| Remove chart |
| Create pivot table from data |
Import
Tool | Description |
| Import markdown table to Excel |
Installation
git clone https://github.com/jauinones/excel-mcp.git
cd excel-mcp
npm install
npm run buildConfiguration
Add to your Claude Code MCP settings (~/.claude.json):
{
"mcpServers": {
"excel": {
"type": "stdio",
"command": "node",
"args": ["/path/to/excel-mcp/dist/index.js"]
}
}
}Example Usage
// Create a simple invoice
create_workbook → "wb_1"
write_cell(wb_1, "Sheet1", "A1", "Item")
write_cell(wb_1, "Sheet1", "B1", "Price")
write_cell(wb_1, "Sheet1", "C1", "Qty")
write_cell(wb_1, "Sheet1", "D1", "Total")
write_range(wb_1, "Sheet1", "A2", [
["Widget", 25.00, 10, "=B2*C2"],
["Gadget", 15.50, 20, "=B3*C3"],
["Thing", 8.99, 50, "=B4*C4"]
])
write_cell(wb_1, "Sheet1", "D5", "=SUM(D2:D4)")
read_cell(wb_1, "Sheet1", "D5")
// → { calculatedValue: 1009.5, formula: "=SUM(D2:D4)" }
save_workbook(wb_1, "/path/to/invoice.xlsx")Tech Stack
TypeScript - Type-safe implementation
ExcelJS - Read/write .xlsx files
HyperFormula - Formula calculation engine (GPLv3)
MCP SDK - Model Context Protocol integration
License
GPLv3 (due to HyperFormula dependency)
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