gmail-mcp-multi

A Gmail MCP server with native multi-account support. Manage multiple Gmail accounts from a single server instance.

Unlike other Gmail MCPs that require running separate server instances per account, this one lets you specify which account to use on each tool call—making it easy to manage personal and work inboxes from Claude Code, Cursor, or any MCP client.

Features

• Multi-account support - Single server instance, unlimited Gmail accounts

• Account aliases - Use friendly names like "work" or "personal" instead of email addresses

• Full Gmail API - Search, read, send, label, and manage emails

• Batch operations - Bulk modify or delete emails efficiently

• Auto token refresh - Handles OAuth token refresh automatically

Installation

npm install -g gmail-mcp-multi

Or run directly with npx:

npx gmail-mcp-multi

Quick Start

1. Set up Google Cloud OAuth

You'll need OAuth credentials from Google Cloud Console:

1. Go to Google Cloud Console

2. Create a new project (or use existing)

3. Enable the Gmail API

4. Create OAuth 2.0 credentials (Desktop app type)

5. Download the credentials JSON

2. Configure the MCP

Create ~/.gmail-mcp/oauth-keys.json with your OAuth credentials.

3. Add to your MCP client

Claude Code (~/.claude/settings.json):

{
  "mcpServers": {
    "gmail": {
      "command": "npx",
      "args": ["gmail-mcp-multi"]
    }
  }
}

4. Authenticate accounts

Once the MCP is running, use the authenticate tool:

authenticate({ alias: "work", email: "you@company.com" })
authenticate({ alias: "personal", email: "you@gmail.com" })

5. Use it!

search_emails({ account: "work", query: "in:inbox is:unread" })
search_emails({ account: "personal", query: "from:mom" })

Tools

All tools that interact with Gmail require an account parameter (alias or email).

Account Management

Email Operations

Label Management

Configuration

Credentials are stored in ~/.gmail-mcp/:

~/.gmail-mcp/
├── config.json           # Account aliases and settings
├── oauth-keys.json       # Your Google OAuth app credentials
└── accounts/
    ├── work/
    │   └── credentials.json
    └── personal/
        └── credentials.json

Development

git clone https://github.com/dmorrill/gmail-mcp-multi.git
cd gmail-mcp-multi
npm install
npm run build
npm run dev

Contributing

Contributions welcome! Please see CONTRIBUTING.md for guidelines.

License

MIT