Promptster for Gemini CLI

io.github.promptster-dev/promptster

Test and compare prompts across any AI provider. Bring your own keys.

client:Gemini CLI transport:streamable-http

Install Promptster in Gemini CLI

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

{
  "mcpServers": {
    "promptster": {
      "httpUrl": "https://www.promptster.dev/mcp"
    }
  }
}

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