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mcp/harbor
Grok

invoice mcp for Grok

io.github.mrfentmen/invoice-mcp

Generate and send invoices across carriers (UPS, USPS, FedEx, DHL).

client:Grok transport:stdio runtime:npm

Install invoice mcp 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": {
    "invoice-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "invoice-mcp"
      ],
      "env": {
        "UPS_API_KEY": "<UPS_API_KEY>",
        "USPS_API_KEY": "<USPS_API_KEY>",
        "FEDEX_API_KEY": "<FEDEX_API_KEY>",
        "DHL_API_KEY": "<DHL_API_KEY>"
      }
    }
  }
}

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

invoice mcp in other clients

invoice mcp MCP server