Connect Gemini CLI to Nylon

Who can still use Gemini CLI

Google stopped serving Gemini CLI for Google AI Pro, Ultra and free Gemini Code Assist accounts on 18 June 2026. It still works with a Gemini Code Assist Standard or Enterprise licence, or a paid Gemini API key. Its replacement, Antigravity CLI, isn’t a supported Nylon client today.

Before you start

• A Nylon Adviser or Elite seat.
• Gemini CLI signed in with a Gemini Code Assist Standard or Enterprise licence, or a paid Gemini API key.
• A browser on the same machine for sign-in. Gemini CLI’s sign-in doesn’t work over SSH or in a headless environment.

Connect

1. Add the server for every project:

   Command

   gemini mcp add --scope user --transport http nylon https://mcp.usenylon.com/mcp

   Without --scope user, Gemini CLI adds Nylon to the current project only, in .gemini/settings.json.

   settings.json

   Add this to ~/.gemini/settings.json:

   {
     "mcpServers": {
       "nylon": {
         "httpUrl": "https://mcp.usenylon.com/mcp"
       }
     }
   }

2. Start Gemini CLI and sign in:

   /mcp auth nylon

   Gemini CLI finds Nylon’s sign-in settings by itself and opens Nylon’s sign-in page in your browser.

3. Sign in to Nylon and choose Allow access.

Try it

Using Nylon, when does Division 7A treat a private company loan to a shareholder as a dividend? Cite the provisions and any ATO guidance.

Troubleshooting

Problem	Fix
The browser doesn’t open	Run Gemini CLI on a machine with a browser. Sign-in needs a local callback.
“Upgrade to Adviser” on the consent screen	Your seat is Starter. Ask your Nylon admin for an Adviser or Elite seat, then sign in again.
Nylon asks you to sign in again	Your sign-in lapses after 30 days without use. Run /mcp auth nylon.