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-2": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-fastmail-2"
      ],
      "env": {}
    }
  }
}

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

Architecture & Capabilities

System Overview

Integrate Fastmail email, calendar, and contacts with any MCP-compatible AI assistant via the JMAP protocol.

Indexed Date

7/22/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for Fastmail

The Fastmail MCP Server is a tool that allows any Model Context Protocol (MCP)-compatible AI assistant to interact with your Fastmail account. It enables AI to manage your emails, calendars, and contacts using the JMAP protocol, enhancing productivity.

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