What file format does excel_create produce?

It produces a standard .xlsx workbook that opens in Microsoft Excel, Apple Numbers, Google Sheets, and any other spreadsheet app. You specify the headers and, optionally, the initial data rows.

Can the AI fill the spreadsheet with data from my Mac apps?

Yes. Because LMCP exposes 150+ tools, your AI can read Mail, Calendar, Contacts, Notes, and more, then pass that data into excel_create to build a populated workbook in one go.

Is my spreadsheet data sent to the cloud?

No. The file is created locally on your Mac by a native process. Nothing about the spreadsheet or its contents is uploaded or stored on any external server.

Which AI assistants can use excel_create?

Claude Desktop, Cursor, VS Code, Windsurf, and Zed auto-configure over local stdio. ChatGPT, Claude.ai, Grok, and Perplexity connect through the LMCP Cloud Relay connector.

Create Excel Files with AI on Mac

The excel_create tool lets your AI assistant generate a real Excel (.xlsx) workbook directly on your Mac. You describe the spreadsheet you want in plain English, and the AI creates the file with your column headers and any data rows you provide — ready to open in Excel, Numbers, or Google Sheets. No copy-pasting, no templates to hunt down.

A concrete example. You type: "Create an Excel file called Q3-budget.xlsx with columns Category, Planned, Actual, and Difference, and add rows for Marketing 5000 4200, Travel 3000 3100, and Software 1200 1150." LMCP runs excel_create and a real .xlsx file lands on your Mac with those headers and three populated rows — formatted and ready to edit.

Which AI agents work?

LMCP works with every major MCP-capable AI client. Desktop apps configure automatically over local stdio; web AIs connect through the LMCP Cloud Relay connector.

Desktop (auto-configured via local stdio): Claude Desktop, Cursor, VS Code (GitHub Copilot), Windsurf, and Zed. LMCP registers itself so the tool is available the moment you restart the client.
Web AIs (via LMCP Cloud Relay): ChatGPT, Claude.ai (web), Grok, and Perplexity. These connect to your Mac through the secure relay connector so they can drive the same local tools.

Automation

The real power comes from chaining excel_create with the other 150+ tools LMCP exposes. Your AI can pull data from your real apps and drop it straight into a spreadsheet:

Read your unread Mail and build a tracking sheet of senders, subjects, and dates.
List this week's Calendar events and export them to an .xlsx schedule.
Pull contacts into a CSV-style workbook for a mail merge.
Summarize a Notes document into a structured table.
After creating the file, ask the AI to email it, save it to OneDrive, or open it in Finder.

Context

Because LMCP runs natively on your Mac, the AI works with your actual data — not a sandbox or a sample set. When you ask it to build a spreadsheet from your inbox, calendar, or contacts, it reads the live information already on your machine. That means the Excel file reflects your real numbers, real dates, and real names, with no manual export step in between.

Productivity

Building a structured spreadsheet by hand — typing headers, formatting columns, entering rows — easily eats fifteen to thirty minutes. With excel_create it's a single sentence and a couple of seconds. Teams use it to turn raw thoughts into trackers, budgets, inventories, and reports without ever leaving the chat. Combined with LMCP's read tools, an entire "gather data, then build report" workflow that used to take half an hour collapses into one prompt.

Privacy & GDPR

Everything happens locally. The .xlsx file is written to your Mac's disk by a native process — your data never travels to an external server, and nothing is stored in the cloud. LMCP holds no copy of your spreadsheets or the data inside them. This is privacy by architecture, not by policy. Learn more about how LMCP is GDPR-compliant by architecture.

Ready to let your AI build spreadsheets for you? Download LMCP — it's free and installs in under a minute.