Mails.ai — Agent Email

Overview

Mails.ai — Agent Email is an MCP server that gives AI agents a real inbox to send, receive, and thread email messages. It operates behind a prompt-injection firewall to protect against malicious inputs while enabling your AI assistant to manage email on your behalf through natural language commands.

The server runs locally via the npm package @mailsai/mcp-server, which communicates with your AI client over stdio. You'll need to provide your MAILS_API_KEY through environment variables to authenticate with the service. The latest release is v0.2.9, available at https://mails.ai.

Mails.ai — Agent Email is listed in the AI & Agents category on mcp.site and works with Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and other MCP-compatible clients. If you maintain this server, you can claim this listing to verify ownership and keep the information current.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "mailsai_agent_email": {
      "command": "npx",
      "args": [
        "-y",
        "@mailsai/mcp-server"
      ],
      "env": {
        "MAILS_API_KEY": "<mails-api-key>"
      }
    }
  }
}

Requires MAILS_API_KEY