Now in Chrome Web Store

An AI pair programmer
inside the Apps Script editor.

GAS Agent is a Chrome extension that opens a terminal-style AI assistant right inside script.google.com. It reads and writes your .gs and .html files, inspects the bound spreadsheet, and applies diffs with one keystroke. No copy-paste. No context switching.

Install on Chrome See how it works
Free plan, no card required Works on any Apps Script project Cancel anytime
Features

Built for the way Apps Script is actually written.

Not a chat sidebar pointing at docs. A native coding agent that touches the files, reads the sheet, and hands you a reviewable diff.

⚙

Native Apps Script integration

Reads and writes .gs and .html files directly through the Monaco editor API. No copy-paste, no tab juggling, no context loss.

☷

Spreadsheet-aware

Inspects the bound sheet's headers, row count, and a small sample before generating code — so the output matches your columns, not a generic template.

➤

Terminal-style UI

Summon the panel with Ctrl+;. Keyboard-first, dense, fast. Dock it on the right or the bottom — your editor, your layout.

↺

Resume any conversation Pro

Every conversation is auto-saved per project. Close the tab, open a different PC, type /resume — you're back where you left off. Up to 20 sessions per project, kept for 90 days.

⏎

Undo that just works

Applied edits are fully undoable via the editor's own undo stack. Auto-save integrates so nothing gets left in a half-saved state.

🔒

Your code stays yours

We don't train on your prompts, code, or spreadsheet data. No product analytics on content. Ever. See the privacy policy.

How it works

Three steps from install to shipping.

No API keys to paste. No config file to set up. Install, sign in, start typing.

Install

Add GAS Agent from the Chrome Web Store. Sign in with your Google account — that's it. No billing details required to start.

Summon

Open any Apps Script project at script.google.com and press Ctrl+;. The terminal docks beside your editor.

Ship

Describe the change in plain Japanese or English. Review the diff, apply with one keystroke, and keep building.

Pricing

Start free. Upgrade when it's paying for itself.

Every plan unlocks the full product. Plans differ only in how much AI usage is included and whether it refills each month.

Every plan includes
  • Normal + High quality models
  • Apps Script editor integration
  • Diff-based edits
  • Bound-spreadsheet awareness
  • No API keys to manage
Free
$0/ forever
Try the full product without entering a card.
  • One-time free credit on signup
  • No monthly refill — upgrade when exhausted
  • Conversation lost when you close the tab
Install free
Most popular
Pro
$7/ month
For daily use by a single developer.
  • Monthly allowance for typical use
  • Refills every billing period
  • Resume conversations — auto-saved, up to 20 sessions per project, kept for 90 days
  • Pick up where you left off from any PC
  • Cancel anytime
Start Pro
Pro Max
$12/ month
For heavy users and agency work.
  • 2.5× the Pro monthly allowance
  • Refills every billing period
  • Resume conversations — auto-saved, up to 20 sessions per project, kept for 90 days
  • Pick up where you left off from any PC
  • Cancel anytime
Start Pro Max

Prices are in USD, inclusive of 10% Japanese consumption tax for customers in Japan. Short-interval rate limits apply to all plans to keep the service healthy. See Terms and 特商法 for details.

FAQ

Questions, mostly asked.

Do I need to bring my own OpenAI API key?
No. Everything runs through our backend. You sign in with your Google account, pick a plan, and start using it. No keys to manage, no upstream billing to reconcile.
Is my code sent to OpenAI?
Only the prompts, file excerpts, and spreadsheet samples needed to answer your specific request are sent to our AI provider (currently OpenAI) to generate a response. INNIT LLC does not train on, analyze, or reuse that content for any other purpose. See the Privacy Policy for specifics.
Which Apps Script projects does it work with?
Any standalone or container-bound Apps Script project opened in script.google.com. Spreadsheet-bound projects get the extra benefit of header/sample awareness.
What happens when I run out of allowance?
On paid plans, your allowance refills at the start of the next billing period. On Free, further requests are blocked until you upgrade — but you keep access to anything you've already generated.
How does session resume work?
On Pro and Pro Max, every conversation is auto-saved to your account, scoped to the Apps Script project you're working on. Open the same project on any PC and type /resume to pick up where you left off — or /sessions to see the list. We keep up to 20 sessions per project for 90 days; older ones are pruned automatically. Free plan conversations are not persisted.
Can I cancel mid-month?
Yes. Cancel from the Stripe Customer Portal accessible inside the extension. You keep paid access through the end of the current billing period; we don't prorate refunds. Details in 特商法表記.
Does it work if Google changes the editor?
The extension hooks into the Monaco editor that powers Apps Script. If Google makes a breaking change, we'll ship a fix. We can't promise zero downtime against a third-party DOM, but we treat those events as top-priority.

Stop pasting code between tabs.

GAS Agent installs in seconds and starts earning its keep on the first request. Ship the thing you were going to spec.

Install on Chrome