How to Connect Gemini to Portfolio Lab

This guide shows you how to connect Gemini to Portfolio Lab so it can trade your investment strategies. You add Portfolio Lab as a custom app in Gemini Spark, which takes about two minutes and needs no code.

Before you start

You need three things:

1. Access to Gemini Spark, signed in with a personal Google account. Work and school accounts are not supported, and you must be 18 or over, in the US, with Keep Activity turned on.
2. Your Portfolio Lab feed link, which you copy from the agentic trading page in the app.
3. A strategy set up in Portfolio Lab with a paper portfolio running.

Connect Portfolio Lab to Gemini

1. On your computer, go to gemini.google.com. At the bottom, click Settings and help, then Connected Apps.
2. Under Custom apps for Spark, add a custom app.
3. Enter the name Portfolio Lab, paste your feed link as the MCP server URL, and follow the prompts to link it.
4. Once connected, Portfolio Lab works in Gemini Spark on both the web and mobile apps.

Once you're connected

Gemini can now read your target weights, but it still needs to know what to do with them. Open the prompt builder in Portfolio Lab to generate a ready-to-use prompt, paste it into Gemini, and Gemini can start trading your investment strategies.

Frequently asked questions

Which Gemini accounts can use custom connectors?

Custom apps work through Gemini Spark. You need Spark access, a personal Google account (not work or school), and you must be 18 or over and in the US.

Do custom apps work on mobile?

Yes. Once you connect Portfolio Lab in the web app, it works in Gemini Spark on both mobile and web.

Can Gemini place trades on its own?

Portfolio Lab's feed is read-only and only provides your target weights. It never places trades. Whether and how your agent places trades depends on the trading tools you connect and your agent's own permission settings, which you control.

Is it safe to connect Gemini to Portfolio Lab?

Yes. Portfolio Lab only shares a read-only list of your target weights. It never sees your brokerage account, never sees your balances, and never moves your money or places trades. The only thing that can act on your account is the separate trading tool you set up, which stays under your control.

Safety and control

The feed is read-only. Portfolio Lab sends target weights and nothing else. It cannot see your account, move money, or place trades. Your agent and the trading tools you connect handle execution, and you control their permissions.

Disclosures

Gemini is a trademark of Google. Portfolio Lab is not affiliated with, endorsed by, or sponsored by Google.