Google Apps Script Copilot (GS Copilot)

AI coding assistant built directly into the Google Apps Script editor

Intermediate
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Screenshot of Google Apps Script Copilot (GS Copilot), AI coding assistant built directly into the Google Apps Script editor

What is Google Apps Script Copilot (GS Copilot)?

Google Apps Script Copilot (GS Copilot) is a code modifier tool. An AI side panel for the Google Apps Script IDE that chats over your open files, completes code inline, refactors selections, and runs plan or agent modes that propose diffs before applying edits across files.

Google Apps Script Copilot is an AI assistant that runs as a side panel inside the script.google.com editor. It reads your open project files, so you can ask a question about a broken function, request new code, or have it trace an error without leaving the IDE or pasting snippets into a separate chatbot. The extension is aimed at developers and automation builders who spend their day writing Apps Script for Sheets, Docs, and other Workspace services, and who want assistance that already knows what the current project contains. Its main modes cover different sizes of work. Chat answers questions with your files in context, and you can @-mention any file to pull it into the conversation or send a selected block or editor error straight into the thread. Inline completions suggest Apps Script and Workspace API calls as you type, and quick edit refactors, fixes, documents, or optimizes a selection in place. For larger jobs, plan mode drafts a step-by-step approach and can ask clarifying questions before writing code, while agent mode explores the project, finds dependencies, and applies edits across every affected file. Each change arrives as a diff you can review, accept, or revert. A slash menu attaches specialist skills such as Sheets expert, triggers, API integration, add-on, web app, library, frontend design, code review, debug, and explain. A prompt enhancer expands a rough one-liner into a structured request, and an optional Google account connection enables MCP for more context-aware answers. The tool competes with general editors that offer AI assistance but do not live inside the Apps Script environment. Its distinguishing bet is proximity: everything happens in the editor you already use, on top of your real files and triggers. The homepage reports over 20,000 developers and a 63 percent self-reported time saving per script.

How do you use Google Apps Script Copilot (GS Copilot)?

  1. 1Install the Chrome extension and sign in
    Add the extension from the Chrome Web Store and sign in with the same Google account you use for Apps Script. Setup is described as taking under a minute.
  2. 2Open a project and the side panel
    Load any script.google.com project and open the Copilot side panel. It reads your files, sheets, and triggers so answers reflect the actual project.
  3. 3Ask a question or mention a file
    Use the chat panel for debugging help, and @-mention specific files or send a selected error to give the assistant full context.
  4. 4Work through plan or agent mode
    Describe a larger goal, let the assistant draft a plan or scan dependencies, then review the proposed edits across files before accepting them.
  5. 5Review, apply, or revert changes
    Inspect the diff for each turn, accept the edits you want, and revert any turn with one click if the result is wrong.
  6. 6Choose a plan and connect a provider
    Stay on the free tier or buy the one-time Lifetime plus BYOK option, then plug in an API key from a supported provider such as OpenAI, Anthropic, Google, or OpenRouter.

Pros and cons

Pros

  • Works inside script.google.com, so project files, sheets, and triggers are read in context without copy-pastingAI
  • Agent and plan modes propose edits as reviewable diffs that can be reverted one turn at a timeAI
  • Specialist skills (Sheets expert, triggers, API integration, add-on, code review) target real Apps Script problem areasAI
  • Lifetime plus bring-your-own-key option lets users pick a supported provider and model instead of a fixed oneAI
  • Free plan and 30-day refund on Lifetime lower the cost of trying itAI

Cons

  • Chrome extension only, so anyone working in another browser or offline has no path to use itAI
  • Lifetime plan requires an API key from a supported provider, and provider usage is billed separately by that providerAI
  • The rollback model is per turn, which is coarser than line-level version control, so mixing AI and manual edits needs careAI
  • Performance and answer quality depend heavily on the chosen model and provider, which the vendor does not controlAI
  • The published productivity figures come from the vendor and self-reported reviews rather than independent benchmarkingAI

How much does Google Apps Script Copilot (GS Copilot) cost?

Free trial

No time-limited trial is described, but the free plan is available without a credit card, and Lifetime purchases carry a 30-day refund.

Learn more

Pricing

A free plan is offered (no credit card, install from the Chrome Web Store). The paid tier is Lifetime + BYOK at $129 one-time, where users supply their own API key from a supported provider and pay that provider separately. A 30-day refund applies to Lifetime.

Learn more

Integrations

Runs inside the Google Apps Script IDE (script.google.com) as a Chrome extension, with optional MCP through a connected Google account and bring-your-own-key support for OpenAI, Anthropic, Google, OpenRouter, DeepSeek, Mistral, Together AI, and Fireworks AI.

Features

Chat over open project files with @-mentions and code or error sending, agent mode that plans and edits across files, plan mode with clarifying questions, inline completions for Apps Script and Workspace APIs, in-place quick edits, reviewable diffs with one-click revert, a prompt enhancer, slash-menu specialist skills, and optional MCP via a connected Google account.

Frequently asked questions about Google Apps Script Copilot (GS Copilot)

  • How much does Google Apps Script Copilot (GS Copilot) cost?
    A free plan is offered (no credit card, install from the Chrome Web Store). The paid tier is Lifetime + BYOK at $129 one-time, where users supply their own API key from a supported provider and pay that provider separately. A 30-day refund applies to Lifetime.
  • Does Google Apps Script Copilot (GS Copilot) offer a free trial?
    No time-limited trial is described, but the free plan is available without a credit card, and Lifetime purchases carry a 30-day refund.
  • How do you use Google Apps Script Copilot (GS Copilot)?
    The walkthrough on this page covers 6 steps: 1. Install the Chrome extension and sign in 2. Open a project and the side panel 3. Ask a question or mention a file 4. Work through plan or agent mode 5. Review, apply, or revert changes 6. Choose a plan and connect a provider.
  • What platforms does Google Apps Script Copilot (GS Copilot) support?
    Google Apps Script Copilot (GS Copilot) is available on Browser extension.
  • What does Google Apps Script Copilot (GS Copilot) integrate with?
    Runs inside the Google Apps Script IDE (script.google.com) as a Chrome extension, with optional MCP through a connected Google account and bring-your-own-key support for OpenAI, Anthropic, Google, OpenRouter, DeepSeek, Mistral, Together AI, and Fireworks AI.
  • What are the limitations of Google Apps Script Copilot (GS Copilot)?
    Chrome extension only, so anyone working in another browser or offline has no path to use it. Lifetime plan requires an API key from a supported provider, and provider usage is billed separately by that provider. The rollback model is per turn, which is coarser than line-level version control, so mixing AI and manual edits needs care.

Status

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Added10/21/2026

Platforms

Browser extension

Pricing

FreePaid

Categories

Code ModifierDeveloperFix My CodeCodingProductivity