MailFlat

Overview

MailFlat is a Model Context Protocol (MCP) server: Real email inboxes for AI agents: open an address, read the one-time code, send mail. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.

It runs locally: the Python package mailflat-mcp (via uvx) speaks MCP over stdio on your machine. Configuration happens through environment variables — you'll need MAILFLAT_API_KEY. The current release is v0.9.2, published under the MIT license, with source at MailFlat/mailflat-sdks on GitHub.

You'll find MailFlat in the Development category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain MailFlat for MailFlat, claim this listing to verify ownership, earn the Verified badge, and keep the details current.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "mailflat": {
      "command": "uvx",
      "args": [
        "mailflat-mcp"
      ],
      "env": {
        "MAILFLAT_API_KEY": "<mailflat-api-key>"
      }
    }
  }
}

Requires MAILFLAT_API_KEY