Setup steps checked Nov 2026.

Your ad accounts, inside Gemini CLI

Gemini CLI has been replaced by Antigravity CLI for unpaid-tier and Google One users (Google's docs, 2026-06-18). If that is you, use Antigravity.

Install

gemini mcp add --transport http -s user oam https://mcp.openadmanager.com/mcp

-s user matters: the default scope is the project, which writes .gemini/settings.json in the folder you are in.

Then start Gemini CLI, run /mcp auth oam, sign in to OpenAdManager and click Allow.

Manual

In settings.json use the key httpUrl (the key url means the older SSE transport):

{ "mcpServers": { "oam": { "httpUrl": "https://mcp.openadmanager.com/mcp" } } }

Headless or SSH

The sign-in needs a browser on the same machine (it uses a random local port). Over SSH, use a personal token instead.

Prompts

Prompts appear by bare name, for example /audit --account_id=....

If something goes wrong

• Settings landed in the wrong folder. You added it at project scope. Remove it and add it again with -s user.
• "Not done. ... is turned off in AI permissions". That is your switches working. Open the link in the message, or Add to your AI in the menu, and turn it on if you want it.