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mcp/harbor
Gemini CLI

MCP Sentinel for Gemini CLI

io.github.oaslananka/sentinel

Zero-trust MCP security proxy with policy enforcement, PII scrubbing, approvals, and audit trails.

client:Gemini CLI transport:stdio runtime:npm

Install MCP Sentinel 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": {
    "sentinel": {
      "command": "npx",
      "args": [
        "-y",
        "@oaslananka/sentinel"
      ],
      "env": {
        "SENTINEL_DB_PATH": "<SENTINEL_DB_PATH>",
        "SENTINEL_UPSTREAM_URL": "<SENTINEL_UPSTREAM_URL>",
        "SENTINEL_UPSTREAM_COMMAND": "<SENTINEL_UPSTREAM_COMMAND>"
      }
    }
  }
}

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

MCP Sentinel in other clients

MCP Sentinel MCP server