give your AI agent a spreadsheet it can actually think in: deterministic Excel-compatible math + structured memory (blocks), real .xlsx out. Open source, self-hostable.

Go language library for reading and writing Microsoft Excel™ (XLAM / XLSM / XLSX / XLTM / XLTX) spreadsheets

MCP server for AI agents to analyze Excel spreadsheets through atomic operations. Like SQL for Excel. Fast, accurate, and efficient. No context overflow.

This MCP server integrates with your Google Drive and Google Sheets, to enable creating and modifying spreadsheets.

Composable Google Sheets CLI for humans and agents. Read, write, update cells by key—with Agent Skills for Claude Code and OpenAI Codex.