databutler facts for Gemini CLI

io.github.physics-star-cat/databutler-facts

Official thresholds, rates and fees by key, with source, verified date and signature.

client:Gemini CLI transport:streamable-http tools:3

Install databutler facts in Gemini CLI

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

{
  "mcpServers": {
    "databutler-facts": {
      "httpUrl": "https://databutler.dev/api/mcp/facts"
    }
  }
}

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