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mcp/harbor
Gemini CLI

blackwall for Gemini CLI

com.blackwalltier/blackwall

API-key pre-action risk gate: any irreversible agent action (money, SQL, delete, email).

client:Gemini CLI transport:stdio runtime:npm

Install blackwall 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": {
    "blackwall": {
      "command": "npx",
      "args": [
        "-y",
        "blackwall-mcp"
      ],
      "env": {
        "BLACKWALL_API_KEY": "<BLACKWALL_API_KEY>",
        "BLACKWALL_MODE": "<BLACKWALL_MODE>"
      }
    }
  }
}

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

blackwall in other clients

blackwall MCP server