ARC-Relay for Gemini CLI

com.arc-relay/mcp

DMARC-safe email forwarding for agents: aliases, DNS health checks, and MCP tools on your domains.

client:Gemini CLI transport:streamable-http

Install ARC-Relay in Gemini CLI

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

{
  "mcpServers": {
    "mcp": {
      "httpUrl": "https://arc-relay.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