MCP Google Sheets Server

Read, write, and manage Google Sheets from Claude Desktop, Claude Code, and any Model Context Protocol (MCP) compatible AI client.

A lightweight, production-ready Model Context Protocol (MCP) server that exposes the Google Sheets API to Claude and other LLM agents. Automate spreadsheet workflows, build AI agent tools that log to sheets, sync data pipelines with your team's spreadsheets, or let Claude edit a doc for you — all with a single MCP server.

Table of contents

• Why

• Features

• Quick start

• Setup

  • 1. Create a Google Cloud project

  • 2. Enable the Sheets API

  • 3. Create OAuth 2.0 credentials

  • 4. Install the server

  • 5. Authorize

• Register with your MCP client

  • Claude Desktop

  • Claude Code

• Available tools

• Usage examples

• Configuration

• Security

• Troubleshooting

• Development

• License

Why

If you've wanted Claude to update a Google Sheet — a job-tracker, a habit log, a project dashboard — without switching windows, this server gives you the missing tool. It's the natural counterpart to Anthropic's official Google Drive MCP connector (which reads files but cannot write cells).

Common workflows:

• Let Claude append rows to a job-application tracker sheet as you apply

• Sync a research reading list, weekly retro, or IELTS study log

• Give an AI agent structured, auditable output to a spreadsheet

• Automate financial or ops dashboards from natural-language prompts

Features

• ✅ Read any range in A1 notation

• ✅ Update cell values with RAW or USER_ENTERED parsing

• ✅ Append rows to any sheet (ideal for logging)

• ✅ Clear ranges without deleting formatting

• ✅ Batch update multiple ranges in one call

• ✅ Inspect spreadsheet metadata (sheet tabs, dimensions)

• 🔐 OAuth 2.0 with local token storage and automatic refresh

• 📦 TypeScript, ES modules, minimal dependencies

• 🖥️ Works with Claude Desktop, Claude Code, and any MCP client over stdio

Quick start

# 1. Clone
git clone https://github.com/yangchoi/mcp-google-sheets.git
cd mcp-google-sheets

# 2. Install and build
npm install
npm run build

# 3. Put your Google Cloud OAuth credentials.json here
mkdir -p ~/.config/mcp-google-sheets
cp /path/to/downloaded-credentials.json ~/.config/mcp-google-sheets/credentials.json

# 4. Authorize (opens browser once)
npm run auth

# 5. Register with Claude — see below

Setup

1. Create a Google Cloud project

• Open Google Cloud Console.

• Click New Project → give it any name (e.g., mcp-sheets).

2. Enable the Sheets API

• In your project, open Google Sheets API.

• Click Enable.

3. Create OAuth 2.0 credentials

• Open Credentials.

• Click Create Credentials → OAuth client ID.

• If prompted, configure the OAuth consent screen first:

  • User type: External (unless you're on a Workspace with Internal available)

  • Add yourself as a test user while the app is in Testing mode

  • Scopes can be left empty at the consent screen; the app will request them at runtime

• Back at Create OAuth client ID:

  • Application type: Desktop app

  • Name: anything (e.g., mcp-google-sheets)

• Click Download JSON and save it. This is your credentials.json.

Move the file to the default config directory:

mkdir -p ~/.config/mcp-google-sheets
mv ~/Downloads/client_secret_*.json ~/.config/mcp-google-sheets/credentials.json

(Or set GOOGLE_SHEETS_CREDENTIALS_PATH to point somewhere else — see Configuration.)

4. Install the server

git clone https://github.com/yangchoi/mcp-google-sheets.git
cd mcp-google-sheets
npm install
npm run build

5. Authorize

Run the one-time OAuth flow. Your browser will open, you approve access to your own Sheets, and the resulting token is stored at ~/.config/mcp-google-sheets/token.json.

npm run auth

You should see Authorization complete. Token saved. in the terminal.

Register with your MCP client

Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows) and add:

{
  "mcpServers": {
    "google-sheets": {
      "command": "node",
      "args": ["/absolute/path/to/mcp-google-sheets/dist/index.js"]
    }
  }
}

Restart Claude Desktop. The Sheets tools will appear in the tool picker.

Claude Code

Add to your Claude Code MCP config (typically ~/.claude/settings.json under mcpServers):

{
  "mcpServers": {
    "google-sheets": {
      "command": "node",
      "args": ["/absolute/path/to/mcp-google-sheets/dist/index.js"]
    }
  }
}

Restart Claude Code. Confirm the tools load via /mcp.

Available tools

All tools take spreadsheetId (found in the sheet URL between /d/ and /edit).

Usage examples

Prompt Claude:

"Look at the spreadsheet 1abcXYZ... and add a new row to the Applications sheet: Legora, Stockholm, Legal AI, 2026-08-18, pending."

Claude will call get_spreadsheet_metadata to find the sheet, then append_row with the values.

Or read + summarize:

"Read the first 20 rows of sheet Applications in 1abcXYZ... and tell me how many are still pending."

Claude calls read_range on Applications!A1:F20, then reasons over the returned array.

Configuration

Environment variables (all optional):

Security

• credentials.json and token.json are local only and never transmitted anywhere except to Google's OAuth servers.

• Both files are covered by .gitignore; do not commit them to version control.

• The server only requests the spreadsheets scope — no Drive-wide access, no Gmail, no calendar.

• Token refresh happens automatically; no long-lived access token is exposed.

• Running the server does not require any network listening port at steady state (the temporary port 47319 is used only during the initial OAuth callback and is closed immediately after).

Troubleshooting

credentials.json not found — you missed step 3–4. Check the path.

Error: access_denied during OAuth — your Google account is not listed as a test user on the OAuth consent screen. Go to OAuth consent screen → add your email under Test users.

insufficient permission when calling a tool — the token was created with a smaller scope. Delete token.json and re-run npm run auth.

Tool doesn't appear in Claude — confirm the path in your MCP config is absolute and points to dist/index.js (not src/index.ts). Ensure you ran npm run build.

No stored token at server startup — you skipped step 5. Run npm run auth.

Development

npm install
npm run dev      # tsc --watch
npm run build    # produces dist/
npm run start    # runs dist/index.js on stdio

Contributions welcome. This is a minimal core; PRs for structural updates (spreadsheets.batchUpdate for formatting, sheet-add, filters, protected ranges) are appreciated.

License

MIT