Log food and track calories with Claude or ChatGPT
Connect Claude or ChatGPT to your Nutrition Cognition account. Then you can log a meal by telling it what you ate, and ask about your calories, nutrients, goals and weight.
Things to ask it
- Log porridge with a banana for breakfast.
- Log the same lunch as yesterday.
- Here's a photo of the label. Add this food to my foods.
- How much protein did I have yesterday, compared with my goal?
- How has my weight changed over the last three months?
How to connect it
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1
Add it to Claude or ChatGPT
Add Nutrition Cognition by its address, api.nutritioncognition.app/mcp. It isn't in their directories yet.
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2
Sign in and choose Allow
Claude or ChatGPT opens Nutrition Cognition's sign-in page. It never sees your password.
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3
Ask in a chat
Tell it what you ate, or ask about your day. What it logs shows up in the Nutrition Cognition apps straight away.
The help page has every step for each app.
It can read
- Your food log for any day, each meal with its calories and nutrients, against your goals
- Calories burned that day, when Apple Health sends them
- Your foods, recipes, saved meals and lists
- Your weight and calorie history, and your goals
It can change
- Log food, for one day or several
- Edit or delete what's logged
- Add, change and delete foods, recipes, saved meals and lists
- Record a weight, set your goals, or follow an official guideline
Claude and ChatGPT can ask you before each change. You choose when, in their settings.
What it can't see
It doesn't see your email address, your password, your friends list or your feed.
What we keep
We keep a record of each request it makes (which tool, when, and whether it worked) for 90 days, and a record of each change it makes for as long as you have your account. The privacy policy has the details.
Disconnect it
You can disconnect it in Nutrition Cognition, under Settings → Claude and ChatGPT, or in Claude or ChatGPT. What it logged stays in your log, and you can change it in the app.
Common questions
Which Claude and ChatGPT plans can use it?
Any Claude plan can add it. On the Free plan it's your one custom connector, and on a Team or Enterprise plan an Owner adds it for the organization first. ChatGPT can add it by its address only on chatgpt.com, and only on some plans and workspaces. Connecting ChatGPT
Does Nutrition Cognition see my chats?
No. It gets only what Claude or ChatGPT asks it for or sends it, such as a food to log or a day to look up. The chat itself is between you and Anthropic or OpenAI, under their terms.
Do I need the iPhone app?
No. An account from the web app is enough. Calories burned come from Apple Health, so Claude and ChatGPT can see them once you use the iPhone app, which is coming soon.