send21 for Gemini CLI

io.github.send21io/mcp

Non-custodial payment drafts/pay links for BTC, USDC, USDT, EURC. Never holds keys.

client:Gemini CLI transport:streamable-http tools:9

Install send21 in Gemini CLI

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

{
  "mcpServers": {
    "mcp": {
      "httpUrl": "https://send21.io/mcp"
    }
  }
}

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