SpendPreflight for Gemini CLI

io.github.spendpreflight/spendpreflight

Preflight x402 payments. Base ERC-8004 agent #1151628; wallet binding verified Nov 3, 2026.

client:Gemini CLI transport:streamable-http tools:17

Install SpendPreflight in Gemini CLI

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

{
  "mcpServers": {
    "spendpreflight": {
      "httpUrl": "https://api.spendpreflight.com/mcp"
    }
  }
}

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