Quick Start (with Agent)

SheetXL gives AI agents a real spreadsheet engine: Excel-compatible calculation with 545+ functions, best-in-class .xlsx support, and a typed SDK the agent writes code against — not a fixed menu of tools.

Pick what you want, copy the prompt, and paste it into your agent. It works in any agent that has a terminal: Claude Code, Codex, Cursor, Copilot, and others.

Upgrade your agent

Spreadsheet skills for my agent

Your agent learns to read, build, calculate, and check spreadsheets. It installs the skill, fetches the engine on demand, and shows you what it can do.

Build something

Answer a couple of questions and the agent builds it, then shows it to you running.

A full spreadsheet app

Toolbar, formula bar, menus, and dialogs. The whole spreadsheet, in your product. By hand

A grid inside my app

Just the sheet, with your own buttons and design around it. By hand

A spreadsheet on a web page

One script tag on any HTML page. No build step, no framework. By hand

Automate spreadsheet files

Read, calculate, and write workbooks from Node: scripts, services, and jobs. By hand

No terminal?

Chat apps such as Claude Desktop cannot run the install command. Connect them through the MCP server instead.

Go deeper — just ask your agent

The agent isn't only the user of the install; it's the installer. Once the skill is in, you can ask it to:

• "Wire up the SheetXL MCP server" — audited edits, undo, and sandbox sessions. The MCP guide has the command, button, or config for each client.
• "Show me this workbook in a viewer" — the agent serves the spreadsheet to a local browser link.
• "Install the SheetXL VS Code extension" — a human in the loop: shared sessions, live highlights, and prompts. The VS Code guide walks through it, click by click and command by command.

The skills repo: github.com/sheetxl/skills