Mailsnail MCP Server

What the code does

We read the source, 1 h ago · rules 3dff92dd89df

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

  const child = spawn(process.execPath, [SERVER], {

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add mailsnail -- npx -y mailsnail

{
  "mcpServers": {
    "mailsnail": {
      "args": [
        "-y",
        "mailsnail"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.mailsnail]
command = "npx"
args = ["-y", "mailsnail"]

{
  "mcpServers": {
    "mailsnail": {
      "args": [
        "-y",
        "mailsnail"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "mailsnail": {
      "args": [
        "-y",
        "mailsnail"
      ],
      "command": "npx"
    }
  }
}

This one needs environment variables set before it will start: MAIL_PROVIDER (Where to mail from: 'managed' (default, no signup, pay-per-piece via Stripe), 'click2mail' (BYO account), or 'lob' (BYO key).), MAIL_API_BASE_URL (Hosted Mailsnail backend. Required when MAIL_PROVIDER=managed.), CLICK2MAIL_USERNAME (Click2Mail account username. Required when MAIL_PROVIDER=click2mail.), CLICK2MAIL_PASSWORD (Click2Mail account password. Required when MAIL_PROVIDER=click2mail.), LOB_API_KEY (Lob API key. Required when MAIL_PROVIDER=lob. test_* is free; live_* actually mails.), MAIL_MCP_ALLOW_LIVE (Set to '1' to actually mail in BYOK modes. Default '0' is dry-run.), MAIL_MCP_SPEND_CAP_USD (Per-session estimated spend cap. Server refuses sends past this.). The author declared them in the registry entry; get the values from the project itself.