Mailsink MCP Server: Install & Setup

Install Mailsink in Claude Code

Claude Code

claude mcp add mailsink -e MAILSINK_API_KEY=... -- npx -y @mailsink/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "mailsink": {
      "command": "npx",
      "args": [
        "-y",
        "@mailsink/mcp"
      ],
      "env": {
        "MAILSINK_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Mailsink MCP server do?

Disposable inboxes for AI agents and CI: catch the verification email, read the OTP or link.

Is the Mailsink MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Mailsink run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Mailsink to Claude Code?

Run: claude mcp add mailsink -e MAILSINK_API_KEY=... -- npx -y @mailsink/mcp

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