Use FitFoodie in Claude, ChatGPT and Gemini

FitFoodie connects to AI assistants through MCP, the open standard assistants use to work with other apps. Once you connect it, you can say "log a chicken Caesar salad for lunch", "how did my calories look this week?" or "add 500 ml of water", and the assistant reads and updates your FitFoodie diary for you. Everything it logs appears in the app straight away, next to your photo and barcode entries.

What you can ask for

• Log a meal by describing it (Premium). FitFoodie estimates calories, protein, carbs, fat, fiber, sugars, sodium and saturated fat, the same way describing a meal in the app works, and files it under the meal you name.
• Check today: totals, what's left against your calorie and macro goals, water so far, and each meal.
• Review recent days: calories, macros and water per day for up to 30 days, with averages.
• Log water or a weigh-in, in kilograms or pounds.
• Log a past meal again, or delete an entry you logged by mistake.

You can phrase things however you like. For how this fits with photo and barcode logging, see our guide to food photo nutrition tracking.

Before you start

You need a FitFoodie account, so sign up in the app first. Every assistant asks for the same server address:

https://fitfoodie.cressu.com/mcp/v1

When you connect, a FitFoodie page opens. Sign in with the same Google or Apple account you use in the app, check what the assistant will be able to do, and click Allow.

Connect FitFoodie to Claude

1. On claude.ai, open Customize and go to Connectors.
2. Click Add, then Add custom connector.
3. Enter the name FitFoodie and the server address, then click Continue.
4. Under Authentication choose Sign in now, and under OAuth client choose Register automatically. Click Add.
5. Click Connect, sign in to FitFoodie and click Allow.
6. Start a new chat and ask "How many calories do I have left today in FitFoodie?"

Connect FitFoodie to ChatGPT

1. On chatgpt.com, open Plugins and click +, then Add custom MCP server.
2. Enter the name FitFoodie and the server address, and choose OAuth sign-in.
3. Read the warning, confirm, and create the connection.
4. Sign in to FitFoodie and click Allow.
5. In a chat, ask ChatGPT to use FitFoodie, for example "Log 300 ml of water in FitFoodie".

Custom MCP servers are only available on some ChatGPT plans. If you don't see the option, check your plan in ChatGPT.

Connect FitFoodie to Gemini

1. On gemini.google.com, open Settings, then Connected Apps.
2. Click Custom (or Add a custom app) and enter the server address. Click Next.
3. Read Google's notice about custom apps and click Connect.
4. Sign in to FitFoodie and click Allow.
5. In a chat, type @FitFoodie and ask your question. Custom apps you add on the web also work in the Gemini mobile app.

Google limits custom apps to personal Google Accounts and may limit them by country, age or language.

Grok: coming soon

Grok supports custom connectors too, and we're finishing FitFoodie's sign-in for it. We'll add the steps here as soon as it works.

Privacy and control

FitFoodie shares only what each request needs and never sells your data. Reconnecting Claude or ChatGPT replaces your old link to it instead of adding a second one. Nutrition values for described meals are AI estimates and aren't medical advice. Read the privacy policy for the details.

Frequently asked questions