Fermat for Gemini CLI

xyz.phase.ai/gateway

OpenAI-compatible LLM gateway: pay per request with an API key, signed receipt for each call.

client:Gemini CLI transport:streamable-http tools:7

Install Fermat in Gemini CLI

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

{
  "mcpServers": {
    "gateway": {
      "httpUrl": "https://mcp.fermat.ai.phase.xyz/mcp"
    }
  }
}

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