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mcp/harbor
Grok

MQTT for Grok

io.github.nagarjunr/mqtt

MCP server for MQTT 5.0 brokers (publish, subscribe, topic discovery).

client:Grok transport:stdio runtime:pypi

Install MQTT 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": {
    "mqtt": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "mqtt5-mcp-server"
      ],
      "env": {
        "MQTT_HOST": "<MQTT_HOST>",
        "MQTT_PORT": "<MQTT_PORT>",
        "MQTT_USERNAME": "<MQTT_USERNAME>",
        "MQTT_PASSWORD": "<MQTT_PASSWORD>",
        "MQTT_USE_TLS": "<MQTT_USE_TLS>"
      }
    }
  }
}

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

MQTT in other clients

MQTT MCP server