Add the connected app
1
Switch to Spark
In the Gemini sidebar, switch the toggle from Chat to Spark, then open Connected Apps.
2
Enter the server
Scroll to Custom apps, paste the MCP server URL, and click Next:Click through the defaults. The OAuth Client ID and Client secret fields stay blank; ContentHero registers itself.
3
Authorize
Accept the risk notice, then Connect. Gemini sends you to ContentHero to approve. Sign in if you are not already, then click Authorize. No API key needed.
4
Save
Gemini shows the connection named ContentHero with its available actions. Click Connect to save it.
Verify
In a Spark task with the app enabled, ask Gemini to read your ContentHero balance. It callsget_account and returns your credits.
Generated media appears as links, not inline. Gemini runs every ContentHero tool and saves results to your library, but it does not render the generation card that Claude and ChatGPT show. Gemini may still describe a “widget” or “media viewer” in its reply; that is the model narrating, not something on your screen. Open the links, or your ContentHero library, to see the results.