Fastmail

Verified Integration

Author: @spawning•Category: ServerApplication

GitHub Repository

JSON-RPC 2.0

Protocol Standard

Sub-second

Execution Latency

Active

Operational Status

Client Configuration

— Connect Fastmail to Claude Desktop or Cursor in seconds

{
  "mcpServers": {
    "fastmail": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-fastmail"
      ],
      "env": {}
    }
  }
}

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Architecture & Capabilities

System Overview

Provides a Model Context Protocol (MCP) server that enables AI assistants to interact with Fastmail's email, contacts, and calendar data.

Indexed Date

7/22/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Fastmail

AI assistants can access and manage comprehensive email operations (list, search, send, attachments, threading, bulk actions), retrieve and search contacts, and list/create calendar events, along with account and mailbox statistics.

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