Poseidon for Gemini CLI

app.askposeidon/poseidon

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client:Gemini CLI transport:streamable-http tools:14

Install Poseidon in Gemini CLI

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

{
  "mcpServers": {
    "poseidon": {
      "httpUrl": "https://api.askposeidon.app/mcp"
    }
  }
}

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