x402 Preflight for Gemini CLI

io.github.chico10117/x402-preflight

Check an x402 endpoint's payment challenge and discovery metadata before paying.

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

Install x402 Preflight in Gemini CLI

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

{
  "mcpServers": {
    "x402-preflight": {
      "httpUrl": "https://x402.chikocorp.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