Skip to content
mcp/harbor
Grok

mailsnail for Grok

io.github.iancollins27/mailsnail

Send USPS letters, postcards & certified mail from any agent. No signup; pay-per-piece via Stripe.

client:Grok transport:stdio runtime:npm

Install mailsnail in Grok

.mcp.json (in your project root)

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "mailsnail": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mailsnail"
      ],
      "env": {
        "MAIL_PROVIDER": "<MAIL_PROVIDER>",
        "MAIL_API_BASE_URL": "<MAIL_API_BASE_URL>",
        "CLICK2MAIL_USERNAME": "<CLICK2MAIL_USERNAME>",
        "CLICK2MAIL_PASSWORD": "<CLICK2MAIL_PASSWORD>",
        "LOB_API_KEY": "<LOB_API_KEY>",
        "MAIL_MCP_ALLOW_LIVE": "<MAIL_MCP_ALLOW_LIVE>",
        "MAIL_MCP_SPEND_CAP_USD": "<MAIL_MCP_SPEND_CAP_USD>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

mailsnail in other clients

mailsnail MCP server