@marlinjai/email-mcp

A unified MCP server for email access across Gmail, Outlook, iCloud, and generic IMAP providers.

Features

• Multi-provider support -- Gmail (REST API), Outlook (Microsoft Graph), iCloud (IMAP), and generic IMAP/SMTP

• OAuth2 authentication -- Browser-based OAuth flows for Gmail and Outlook, with automatic token refresh

• Full email client -- Search, read, send, reply, forward, organize, and manage drafts

• Batch operations -- Delete, move, or mark hundreds of emails in a single call

• Lightweight search -- Compact search results by default (~20KB vs ~1.4MB) with optional full body retrieval

• Encrypted credential storage -- AES-256-GCM encryption at rest with machine-derived keys

• Provider-native APIs -- Uses Gmail API and Microsoft Graph where available for richer features, falls back to IMAP for universal compatibility

Installation

Install globally from npm:

npm install -g @marlinjai/email-mcp

Or run directly with npx (no install needed):

npx @marlinjai/email-mcp

Quick Start

1. Run the interactive setup wizard to add your email accounts:

npx @marlinjai/email-mcp setup

The wizard will walk you through provider selection and authentication. After each account, it asks if you'd like to add another — so you can set up Gmail, Outlook, and iCloud all in one go.

2. Add the server to your MCP configuration (.mcp.json):

{
  "mcpServers": {
    "email": {
      "command": "npx",
      "args": ["@marlinjai/email-mcp"]
    }
  }
}

3. Start using email tools in Claude Code — search your inbox, send emails, organize messages, and more.

Provider Setup Guides

Gmail

No configuration needed — the setup wizard handles everything using built-in OAuth credentials (PKCE):

npx @marlinjai/email-mcp setup
# Select "Gmail" when prompted
# A browser window opens for Google authorization
# Grant the requested permissions and return to the terminal

Note: If you prefer to use your own OAuth app, create a Desktop OAuth 2.0 Client in the Google Cloud Console with the Gmail API enabled.

Outlook

No configuration needed — the setup wizard handles everything using built-in OAuth credentials (PKCE):

npx @marlinjai/email-mcp setup
# Select "Outlook" when prompted
# A browser window opens for Microsoft authorization
# Sign in and grant the requested permissions

Note: If you prefer to use your own OAuth app, register one in the Azure Portal with Mail.ReadWrite, Mail.Send, and offline_access permissions.

iCloud

1. Go to appleid.apple.com and sign in.

2. Navigate to App-Specific Passwords and generate a new password.

3. Run the setup wizard:

npx @marlinjai/email-mcp setup
# Select "iCloud" when prompted
# Enter your iCloud email address
# Enter the app-specific password you generated

Generic IMAP

Run the setup wizard with your IMAP/SMTP server details:

npx @marlinjai/email-mcp setup
# Select "Other IMAP" when prompted
# Enter your IMAP host, port, and credentials
# Optionally enter SMTP host and port for sending

Available Tools (24)

Account Management (4)

Reading & Searching (5)

Sending & Drafts (5)

Organization (7)

Batch Operations (3)

All batch tools accept a sourceFolder parameter for IMAP/iCloud and include a sequential fallback for maximum compatibility.

Usage with Claude Code

Add the following to your .mcp.json file (project-level or global ~/.claude/.mcp.json):

{
  "mcpServers": {
    "email": {
      "command": "npx",
      "args": ["@marlinjai/email-mcp"]
    }
  }
}

Once configured, you can ask Claude to interact with your email:

• "Check my inbox for unread messages"

• "Search for emails from alice@example.com in the last week"

• "Reply to the latest email from Bob and thank him"

• "Move all newsletters to the Archive folder"

• "Delete all spam emails" (uses batch operations for speed)

• "Draft a follow-up email to the team about the meeting"

Development

# Install dependencies
pnpm install

# Build the project
pnpm build

# Run in development mode (watch for changes)
pnpm dev

# Run tests
pnpm test

# Run tests in watch mode
pnpm test:watch

# Run integration tests (requires real email accounts)
pnpm test:integration

Support

If this project is useful to you, consider supporting its development:

• GitHub Sponsors

• Buy Me a Coffee

License

MIT