Gmail MCP Server

MCP Gmail Server

A Model Context Protocol (MCP) server for integrating Gmail with Claude and other MCP-compatible AI assistants.

🚀 Features

List emails: Retrieve emails from your inbox
Send emails: Compose and send emails
Email management: Delete, archive, mark as read
Batch operations: Process multiple emails in a single operation
Label management: List and move emails to specific labels

📋 Prerequisites

Node.js 18 or higher
A Google account with Gmail API enabled
OAuth2 credentials (Client ID, Client Secret)

🔧 Installation

Clone the repository:

git clone https://github.com/jStrider/gmail-mcp.git
cd gmail-mcp

Install dependencies:

npm install

Configure your OAuth2 credentials (see Configuration section)

⚙️ Configuration

Step 1: Create a Google Cloud Project

Go to Google Cloud Console
Create a new project or select an existing one
Enable the Gmail API for your project
Go to "Credentials" and create an OAuth2 Client ID
Application type: "Desktop app"
Important: Add http://localhost:3000 to the authorized redirect URIs

Step 2: Get the Refresh Token

Run the authentication script:

npm run get-token

Follow the on-screen instructions to:

Enter your Client ID
Enter your Client Secret
Authorize access in your browser
Retrieve your Refresh Token

Step 3: Configure Environment Variables

Create a .env file at the project root:

GMAIL_CLIENT_ID=your_client_id
GMAIL_CLIENT_SECRET=your_client_secret
GMAIL_REFRESH_TOKEN=your_refresh_token

🎯 Usage with Claude Desktop

Add the server to your Claude Desktop configuration (claude_desktop_config.json):

{
  "mcpServers": {
    "gmail": {
      "command": "node",
      "args": ["/path/to/gmail-mcp/build/src/index.js"],
      "env": {
        "GMAIL_CLIENT_ID": "your_client_id",
        "GMAIL_CLIENT_SECRET": "your_client_secret",
        "GMAIL_REFRESH_TOKEN": "your_refresh_token"
      }
    }
  }
}

Restart Claude Desktop

📚 Available Tools

list_emails

List emails from inbox

maxResults: Maximum number of emails (default: 10)
query: Gmail search query (optional)

send_email

Send an email

to: Recipient email address
subject: Email subject
body: Email body

delete_email

Delete an email

id: Email ID

archive_email

Archive an email

id: Email ID

mark_as_read

Mark an email as read

id: Email ID

Batch Operations

delete_emails_batch: Delete multiple emails
archive_emails_batch: Archive multiple emails
mark_as_read_batch: Mark multiple emails as read

Label Management

list_labels: List all available labels
move_to_label: Move an email to a label
move_to_label_batch: Move multiple emails to a label

🛠️ Useful Scripts

# Build the project
npm run build

# Build in watch mode
npm run watch

# Get a new refresh token
npm run get-token

# Clean and rebuild
npm run rebuild

# Inspect the MCP server
npm run inspector

📁 Project Structure

mcp-gmail/
├── src/              # TypeScript source code
│   └── index.ts      # MCP server entry point
├── scripts/          # Utility scripts
│   └── get-refresh-token.ts
├── build/            # Compiled JavaScript code
├── .env              # Environment variables (ignored by git)
├── .env.example      # Configuration example
├── package.json      # npm configuration
├── tsconfig.json     # TypeScript configuration
└── README.md         # This file

🔒 Security

Never share your OAuth2 credentials
The .env file is automatically ignored by Git
Use minimal permissions for the Gmail API

📝 License

MIT - See the LICENSE file for details.

🤝 Contributing

Contributions are welcome! Feel free to open an issue or pull request.

🐛 Troubleshooting

If you encounter issues:

Verify that the Gmail API is enabled in your Google Cloud project
Ensure redirect URIs include http://localhost:3000
Check that your refresh token is valid

📧 Contact

Julien Renaud - GitHub

This server cannot be installed

security - not tested

license - permissive license

quality - not tested

How are these scores calculated?

A Model Context Protocol server that enables Claude to interact with Gmail through a secure OAuth2 connection, providing email management capabilities like listing, sending, deleting, and organizing emails.

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