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mcp/harbor
Gemini CLI

Sparkplug B for Gemini CLI

io.github.nagarjunr/sparkplug-b

MCP server for Sparkplug B: node/device discovery, metrics, commands, host state over MQTT.

client:Gemini CLI transport:stdio runtime:pypi

Install Sparkplug B in Gemini CLI

~/.gemini/settings.json · windows: %USERPROFILE%\.gemini\settings.json

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

{
  "mcpServers": {
    "sparkplug-b": {
      "command": "uvx",
      "args": [
        "sparkplug-b-mcp-server"
      ],
      "env": {
        "SPARKPLUG_MQTT_HOST": "<SPARKPLUG_MQTT_HOST>",
        "SPARKPLUG_HOST_ID": "<SPARKPLUG_HOST_ID>",
        "SPARKPLUG_MQTT_PORT": "<SPARKPLUG_MQTT_PORT>",
        "SPARKPLUG_MQTT_USERNAME": "<SPARKPLUG_MQTT_USERNAME>",
        "SPARKPLUG_MQTT_PASSWORD": "<SPARKPLUG_MQTT_PASSWORD>",
        "SPARKPLUG_MQTT_USE_TLS": "<SPARKPLUG_MQTT_USE_TLS>",
        "SPARKPLUG_GROUP_ID": "<SPARKPLUG_GROUP_ID>"
      }
    }
  }
}

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs

Sparkplug B in other clients

Sparkplug B MCP server