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MailSandbox

Verified Integration
Author: @btafoya•Category: ServerApplication
GitHub Repository
JSON-RPC 2.0
Protocol Standard
Sub-second
Execution Latency
Active
Operational Status
Tags:#Claude#Search#Database#API#Git#AI#GitHub#Node.js#Docker

Client Configuration

— Connect MailSandbox to Claude Desktop or Cursor in seconds
{
  "mcpServers": {
    "mailsandbox": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-mailsandbox"
      ],
      "env": {}
    }
  }
}
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).
Architecture & Capabilities

System Overview

Offers a fast, zero-dependency email testing tool and API, featuring a web UI, SMTP server, Postmark API emulation, and an MCP server for AI-assisted debugging.

Indexed Date

7/23/2026

License

Open Source

Protocol Layer

stdio / SSE RPC

Frequently Asked Questions

Architecture and operational details for MailSandbox

MailSandbox is a fast, lightweight, zero-dependency email testing tool and API designed for developers. It provides an SMTP server, POP3 server, modern web UI, REST API, Postmark API emulation, and an MCP server for AI-assisted debugging.

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