mailbox-mcp

Give your AI tools access to your email. Search, read, send, and manage messages across multiple accounts without leaving your terminal.

mailbox-mcp is an MCP server that connects your email to Claude Code, Cursor, Windsurf, or any AI tool that supports the Model Context Protocol. Instead of switching between your terminal and Gmail, you ask the AI to find that invoice, summarize a thread, or draft a reply — and it does.

What makes this different from the 60+ other email MCP servers:

• Multiple accounts, one server. Work email, personal email, client accounts — all accessible through a single server. No need to run separate instances.
• Not just Gmail. Supports Gmail (full API), any IMAP/SMTP provider (ProtonMail, corporate mail, self-hosted), and JMAP (Fastmail, Stalwart, Topicbox). Add providers without changing a line of tool code.
• Actually secured. 6 rounds of security auditing. Encrypted credentials (AES-256-GCM), prompt injection fencing on every email field, rate limiting, TLS enforcement, SSRF protection with IP encoding evasion detection, input validation. Most MCP servers skip security entirely.
• 36 tools. Search, read, send, reply, forward, drafts, labels, filters, templates, signatures, vacation replies, attachments, unsubscribe, and more.
• Zero native dependencies. Pure Node.js. Install and run anywhere.

git clone https://github.com/jgalea/mailbox-mcp.git
cd mailbox-mcp
npm install && npm run build

Then add to your Claude Code MCP config (~/.claude.json):

{
  "mcpServers": {
    "mailbox": {
      "command": "node",
      "args": ["/path/to/mailbox-mcp/dist/server.js"]
    }
  }
}

Replace /path/to/mailbox-mcp with the actual path where you cloned the repo.

1. Download OAuth credentials from Google Cloud Console
2. Save as `~/.mailbox-mc