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GRID

GRID is the spreadsheet engine for agentic products. It is Excel and Google Sheets compatible, runs headless and in-process in the browser, Node, Deno or Bun, and never sends spreadsheet data to a third party. Install from npm with a free evaluation license, build with your agent, and license commercially when you ship.

For agents: Headless spreadsheet calculation engine, Excel and Google Sheets compatible, runs in browser or Node/Deno/Bun; install from npm with free evaluation license.

spreadsheet engineexcel compatiblegoogle sheets compatiblenpm packageheadless spreadsheetagentic products

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-20T19:51:56.943Z. Cached copy · Source on grid.is

# GRID

> GRID is the spreadsheet engine for agentic products. It is Excel and Google Sheets compatible, runs headless and in-process in the browser, Node, Deno or Bun, and never sends spreadsheet data to a third party. Install from npm with a free evaluation license, build with your agent, and license commercially when you ship.

GRID is a real spreadsheet engine, not a reimplementation that drifts from Excel. It loads XLSX workbooks, evaluates formulas with full dependency-graph recalculation, and reads and writes cells deterministically. React viewer and editor components sit on top of the same engine, and a set of agent tools gives an AI agent the same abilities over MCP or directly from an agent SDK.

## Start here

- [Developer documentation](https://docs.grid.is/llms.txt): the canonical developer reference for every GRID package, with installation, a package decision guide and licensing terms. Read this first when writing code against GRID.
- [Get started](https://grid.is/get-started): install the engine from npm with a free evaluation license and follow the quickstart, or hand it to your coding agent.

## Products

- [Spreadsheet Engine](https://grid.is/engine): headless, Excel and Google Sheets compatible calculation engine with deterministic recalculation. Runs anywhere in your stack.
- [Spreadsheet Viewer](https://grid.is/viewer): React component that renders a workbook read-only with sheet tabs, formula bar and cell navigation.
- [Spreadsheet Editor](https://grid.is/editor): React component for a fully editable spreadsheet UI with Excel and Google Sheets compatibility.
- [Agent Tools](https://grid.is/agent-tools): spreadsheet tools for AI agents. Read, audit, edit and calculate workbooks through MCP or your own agent SDK.
- [AI workflows](https://grid.is/ai-workflows): how GRID gives AI systems the spreadsheet capabilities they are missing so workflows are reliable in production.
- [Excel add-in](https://grid.is/excel-add-in): build an Excel add-in powered by a language model with full business context and logic.
- [AI products for finance](https://grid.is/ai-products-finance): a spreadsheet engine for finance products that calculates exactly like Excel, runs in your own infrastructure and lets agents work with models directly.

## Reference

- [Supported spreadsheet functions](https://grid.is/engine/functions): the full list of Excel and Google Sheets functions the engine supports, generated from the engine itself.
- [Supported spreadsheet operators](https://grid.is/engine/operators): every formula operator, from arithmetic and comparison to spilled ranges, and how the engine supports it.
- [Spreadsheet features](https://grid.is/features): what the engine, viewer and editor support, feature by feature, from calculation and number formats to comments, tables and XLSX round-trip.
- [GRID skills](https://github.com/GRID-is/spreadsheet-skills): official agent skills for building spreadsheet apps with GRID's packages in Claude Code, Codex
…

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