Yes. Nutrition MCP is open source (MIT). You can run your own instance with your own Supabase project — the GitHub repository includes a full self-hosting guide and a Dockerfile.

Free · Open source · OAuth 2.0

Track your nutrition by talking to your AI.

Connect Claude or ChatGPT, then just say what you ate. Calories and macros, logged automatically.

Quick install

Nutrition MCP online

Two eggs, whole-wheat toast, and a coffee for breakfast

Meal logged

Two eggs, toast & coffee · breakfast

+340 kcal

16%

Calories today

340/ 2,100

1,760 kcal left

Protein 20/150

Carbs 30/220

Fat 15/70

Sugar 2.5

limit 45 g

Caffeine 95

limit 400 mg

Fiber 3.4

of 30 g

Done — added that to breakfast: two eggs, toast, and a coffee. That's about 340 kcal (20g protein, 30g carbs, 15g fat, 3.4g fiber), plus 95mg of caffeine from the coffee.

How's my weight trending?

Weight

Latest

74.5kg

−0.6 kg since 5 Jul

7 weigh-ins · 5 Jul → 11 Jul Target 73.0 kg · 1.5 kg to lose

You're down 0.6 kg this week and 1.5 kg from your 73 kg goal — your 7-day average is trending down nicely.

Message Nutrition…

How it works

Three steps. No app to learn.

1 · Connect once

Works with any AI client that supports remote MCP servers — Claude, ChatGPT, and more. No install, no API keys.

2 · Just say what you ate

Describe it in plain language — or send a photo of your meal, a screenshot from a delivery app, or a barcode (it looks the product up online). Macros logged automatically.

3 · Track & review

Ask for daily summaries, weekly trends, goal progress, or export it all to CSV — completely free.

Quick install

Connect in under a minute

Works with any MCP client that supports OAuth 2.0 with PKCE. On first connect you create an account with Google or an email and password; sign in the same way to keep your data.

Claude ChatGPT Other agents

Open Claude (web or desktop) and click Customize in the top-left corner.
Click Connectors.
Click +, then Add custom connector.
Give it a name, for example Nutrition.
Paste https://your-domain.com/mcp into the Remote MCP server URL field.
Click Add.
Click Connect — the login page opens; continue with Google or sign in with an email and password.
Done. It works right away and shows up in your iOS and Android apps automatically.

Works on every Claude plan. The free plan allows one connected MCP server at a time.

Open ChatGPT on the web → Settings → Apps.
Click Create app at the bottom of the popup. If you don't see it, turn on Developer mode in Advanced settings.
Give it a name, for example Nutrition.
For Connection, paste https://your-domain.com/mcp.
For Authentication, choose OAuth — leave everything else as it is.
Check "I understand and want to continue".
Click Create.
Click Sign in with Nutrition — the login page opens; continue with Google or sign in with an email and password.
Done. It works right away and shows up in your iOS and Android apps automatically.

{
  "mcpServers": {
    "nutrition": {
      "url": "https://your-domain.com/mcp"
    }
  }
}

Add the config above to your client (Cursor, VS Code, Claude Code, and more). Windsurf uses serverUrl instead of url. In Claude Code, run claude mcp add --transport http nutrition https://your-domain.com/mcp. Your client handles the OAuth login automatically.

Onboarding

Set up once — or just start talking

This is completely optional — Nutrition MCP works the moment you connect. If you want, these two quick steps make it more accurate, but you can skip straight to logging.

Set your timezone — so days roll over at your local midnight and today's totals stay accurate wherever you are. Just say Set my timezone to New York.
Set your goals — daily calorie, macro, and water targets, plus an optional target weight and your preferred weight unit (kg or lb), to track your progress against. Just say Set my daily goal to 2,000 calories and 150g of protein.
Start logging — just say what you ate, send a photo or scan a barcode. That's it. Just say I had oatmeal with berries for breakfast.

Everything here is optional. You can do it now, later, or never — just start logging and set these whenever you like.

Curious what it can actually do? Browse all 38 tools — logging, barcodes, water, weight, goals, and trends — with a description and an example prompt for each.

Try saying

Just talk to it.

A few of the things you can do — just by talking.

Nutrition MCP online

Log a chicken burrito bowl for lunch

Meal logged

Chicken burrito bowl · lunch

+650 kcal

47%

Calories today

990/ 2,100

1,110 kcal left

Protein 62/150

Carbs 98/220

Fat 37/70

Sugar 6.5

limit 45 g

Caffeine 95

limit 400 mg

Fiber 15.4

of 30 g

Water

1.2/2.5 L

Got it — added a chicken burrito bowl to lunch, about 650 kcal (42g protein, 68g carbs, 22g fat) and 12g of fiber from the beans.

Here's my dinner — what's in it?

Looks like grilled salmon with rice and broccoli — logged to dinner, around 540 kcal (38g protein, 45g carbs, 20g fat).

Log this

Found it — Chobani Greek yogurt, 1 cup: 120 kcal, 15g protein. Which meal is this?

Breakfast Lunch Dinner Snack

Meal logged

Chobani Greek yogurt, 1 cup · snack

+120 kcal

73%

Calories today

1,540/ 2,100

560 kcal left

Protein 98/150

Carbs 150/220

Fat 52/70

Sugar 28.4

limit 45 g

Caffeine 95

limit 400 mg

Fiber 19.2

of 30 g

Logged to snacks — 120 kcal, 15g protein, 9g sugar.

Set my timezone to New York

Done — your days now roll over at midnight Eastern, so today's totals stay accurate wherever you are.

How am I doing on protein today?

You're at 118g of your 150g goal — 32g to go. A cup of Greek yogurt or a chicken breast would get you there.

Show my trends this week

Trends

Calories / day 7/7 days logged

07-0507-11

94%

7-day avg · all days

1,980/ 2,100

120 kcal under

Protein 148/150

Carbs 205/220

Fat 66/70

Sugar 38.2

limit 45 g

Caffeine 180

limit 400 mg

Fiber 26.8

of 30 g

Water

2.1/2.5 L

You're averaging 1,980 kcal a day — 120 under goal, with sugar and caffeine both comfortably inside your limits. Fiber is averaging 26.8 g, just short of your 30 g goal.

Log my weight, 74.5 kg

Weight

Latest

74.5kg

−0.6 kg since 5 Jul

7 weigh-ins · 5 Jul → 11 Jul Target 73.0 kg · 1.5 kg to lose

Logged — you're trending toward your goal.

Tracked so far, together

A growing global food log

— Calories tracked

— food logs — protein — carbs — fat

Logged across 35 timezones worldwide

Everything, just by chatting

What you can track

Meals in plain language

Describe what you ate — your AI estimates calories, protein, carbs, fat, fiber, total sugar, and caffeine in milligrams and logs it.

Scan a barcode

Snap or type a product barcode and pull macros, fiber, and sugar from Open Food Facts, scaled to how much you ate.

Goals & progress

Set daily calorie, macro, fiber, and water targets — plus sugar, caffeine, and alcohol limits to stay under — and check live progress toward them.

Summaries & trends

Daily and weekly breakdowns, 7/14/30-day trends, streaks, and recurring meal patterns.

Water logging

Track hydration in milliliters alongside your meals and review it by day.

Weight tracking

Log your body weight in kg or lb, see 7/14/30-day trends, and track progress toward a target weight.

Timezone-aware

Days roll over in your local time, wherever you are in the world.

Import from another app

Bring your meal history over from MyFitnessPal, Cronometer, Lose It!, or MacroFactor — or any other CSV, by mapping its columns yourself. You confirm what gets added before anything is saved.

Export & own your data

Export everything to CSV anytime, and delete your account and data whenever you want.

Why Nutrition MCP

Talking beats tapping.

Snap a barcode or just say what you ate — no database digging, no separate app to open.

Traditional apps

Search a database for every item
Fix wrong database entries by hand
Yet another app, account, and paywall
Tedious manual logging

Nutrition MCP

Describe meals in plain language
Calories & macros estimated for you
Works inside Claude or ChatGPT, free
Ask for trends, summaries, and goals

Switching from a specific app? See how Nutrition MCP compares to MyFitnessPal, Cronometer, and other trackers.

Private by default Only you can see your data.

Open source Audit or self-host it.

Export anytime Your full history as CSV.

Delete instantly Remove your account & data.

Start tracking in under a minute.

Free and open source — it works with the AI you already use.

Quick install

FAQ

Frequently asked questions

What is Nutrition MCP?

Nutrition MCP is a free Model Context Protocol (MCP) server that lets you track meals, calories, macros, and nutrition history through natural conversation with Claude or ChatGPT. Instead of typing into a traditional app, you tell your AI what you ate and it logs everything for you.

What is the Model Context Protocol (MCP)?

The Model Context Protocol is an open standard that lets AI assistants like Claude and ChatGPT connect to external tools and data sources. An MCP server provides specific capabilities — here, nutrition tracking — that the AI can use during a conversation. Think of it as a plugin system for AI assistants.

Does it work with ChatGPT?

Yes. In ChatGPT on the web, open Settings → Apps, create a custom app with the server URL using OAuth, and sign in. It works on every ChatGPT plan.

Which other clients are supported?

Any MCP client that supports OAuth 2.0 with PKCE — including Claude.ai, the Claude desktop and mobile apps, Claude Code, Cursor, Windsurf, and VS Code.

Can I self-host it?

Yes. Nutrition MCP is open source (MIT). You can run your own instance with your own Supabase project — the repository includes a full self-hosting guide and a Dockerfile.

Is Nutrition MCP free?

Yes, it is completely free — no premium tiers, ads, or hidden costs. You just need a Claude or ChatGPT account to connect.

What can I track?

Calories, protein, carbohydrates, fat, fiber, total sugar, and water for every entry — described in plain language or pulled from a product barcode via Open Food Facts. Caffeine is tracked too, in milligrams, the unit every label uses, and it adds no calories. Alcohol is tracked as well, in grams of pure ethanol, once you switch it on. You can also log your body weight in kg or lb and track trends toward a target weight. View daily summaries, query meals by date range, update or delete past entries, set goals, and monitor trends over time.

Does it track alcohol?

Only if you turn it on — alcohol tracking is off by default. Switched on, drinks are recorded in grams of pure ethanol and shown as US standard drinks or UK units, whichever you prefer. Nothing infers alcohol for you: it comes from a drink you log or an alcohol column in a file you import. Switching it back off hides alcohol from your meals, goals, and summaries and stops the importer reading alcohol columns — it is not a delete switch, and your CSV export always includes what you logged.

Can I import my history from MyFitnessPal or another app?

Yes. Ask to import your history and an importer opens in the chat: you pick the CSV your old app exported, check how its columns map, and see what will be added before confirming. Exports from MyFitnessPal, Cronometer, Lose It!, and MacroFactor are recognised automatically, and any other CSV works by mapping the columns yourself. Your browser reads the file, so the AI never retypes your rows. In clients without in-chat panels you can paste your export instead — and importing the same file twice does not create duplicates.

Is my data private?

Your data is stored securely and linked to your personal account. Only you can access your nutrition history through your authenticated session. Nutrition MCP does not sell or share your data, and you can delete your account and all data at any time.