How to use Grok and Grok Bot to help you diet

Updated November 2, 2026

TL;DR

“Grok” covers three products, and each connects to a food diary differently: a custom connector in Grok chat, a request to your Bot in Grok Bot, and a command in Grok Build. All three use the same address, https://mcp.caloriecub.com/mcp. Grok Bot adds something the others don’t: a routine can send you a diet check-in on a schedule.

Which Grok do you use?

•
Grok chat, at grok.com: the everyday assistant. xAI says connectors are available to all Grok users. On Business and Enterprise, an admin has to provision them first.
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Grok Bot: named Bots that run on their own cloud computer, with desktop and phone apps. It’s included on the Premium, Super, and Ultra tiers of The X Subscription and on paid legacy Cursor plans, but not on Free or Plus.
•
Grok Build: xAI’s coding agent for the terminal. Worth it only if you already use it.

Calorie Cub isn’t in the Grok Build plugin marketplace or the Grok Bot catalog yet, so each route below adds it by address.

Connect Grok chat

1.
Go to grok.com/connectors.
2.
Select New Connector, then Custom.
3.
Enter https://mcp.caloriecub.com/mcp and complete the Calorie Cub sign-in.
4.
Start a chat and tell Grok what you ate, or ask what’s left in your goals.

Connect Grok Bot

You add a server that isn’t in the catalog by asking your Bot:

1.
In a Bot chat, say: “Add a custom MCP server called Calorie Cub at https://mcp.caloriecub.com/mcp.”
2.
Check that the address is right, then approve it if the Bot asks you to confirm.
3.
When a Connect card appears, select Authorize or Authenticate, then sign in to Calorie Cub in your browser and approve access.
4.
In your next message, type @ to attach Calorie Cub to the task.

A connected app is available to every Bot you run, so keep that in mind if you share Bots with other work. xAI says OAuth tokens are held on Cursor’s connector backend, and the Bot uses the tools without receiving the tokens.

Connect Grok Build

One command adds it. Grok opens a browser for sign-in the first time it needs the server:

grok mcp add --transport http calorie-cub https://mcp.caloriecub.com/mcp

Prompts for Grok chat

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“What have I eaten today, and how much protein do I still need?”
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“Find something at Starbucks that fits what I have left today.”
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“Show my calories for the last two weeks. Which days went over, and what did those days have in common?”
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“Set my goal to 2,000 calories and 150 g of protein.” (Needs Calorie Cub Pro.)
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“Log a cup of oatmeal with blueberries for breakfast.” (Needs Calorie Cub Pro.)

Turn a check-in into a Grok Bot routine

This is where Grok Bot differs. A routine gives a Bot a job and tells it when to run, and it keeps running on the Bot’s cloud computer while your devices are closed. Reading your diary works on Calorie Cub’s free plan, so a weekly review doesn’t need Pro.

Run the task once by hand first, as xAI suggests, and check the result. Then ask for something like:

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“Every Sunday at 6 pm, read my last seven days from Calorie Cub. Tell me my average calories and protein, my weight trend, and one change to try next week.”
•
“Every weekday at 3 pm, check what I’ve logged today. If I haven’t logged lunch, remind me.”

Keep routines to reading and reminding. A Bot that logs meals on a schedule would be filling your diary with guesses about what you ate. You can pause or resume routines from the phone app.

For logging by hand, the Bot composer has Start voice input, so you can say what you ate. Logging needs Calorie Cub Pro.

Where this can go wrong

These are new, fast-changing products. If a menu label doesn’t match, xAI has probably moved it, so look for the option to add a connector or MCP server by URL. If a Grok Bot connection stalls during sign-in, ask the Bot to try again, or use Reconnect on the app.

Portions are still on you. “A bowl of pasta” can be 300 calories or 900, so give a size or weight when it matters, and check the serving Grok picked.

What you ask, including diary data the assistant reads, also goes to xAI, and for Grok Bot to Cursor’s connector service. Disconnect it in Calorie Cub’s Settings and it loses access immediately.

Food diary, not medical advice

Grok and Calorie Cub can help you keep track and think through options, but neither is a doctor or dietitian, and an assistant can be wrong with total confidence. If you’re pregnant, have diabetes or another condition, take weight-loss medication, or have a history of disordered eating, talk to a clinician before changing how you eat.

What Calorie Cub costs

Tracking in the Calorie Cub app is free with no time limit, and the free plan lets one assistant read your diary. Logging, editing, and setting goals by chat is part of Pro: $6.99 a month, or $39.99 a year with a 3-day free trial. Your assistant’s own subscription is separate.

Questions people ask

What’s the difference between Grok and Grok Bot?

Grok is the chat assistant at grok.com. Grok Bot is a separate app with named Bots that keep their own cloud computer and context, and can run routines. They connect to Calorie Cub separately.

Can Grok make me a diet plan?

It can draft one in chat. Connected to Calorie Cub, it can base the draft on your goals and what you actually log. Check its numbers, and treat the plan as a starting point.

Do I need a paid Grok plan?

xAI says connectors are available to all Grok users. Grok Bot needs an eligible plan: Premium, Super, or Ultra, or a paid legacy Cursor plan.

Is Calorie Cub a Grok Bot plugin?

Not yet. It isn’t in the catalog, so ask your Bot to add it by address as shown above.

Other guides

Use ChatGPT to help you diet ›ChatGPT diet plan and meal plan prompts ›Is ChatGPT accurate for calories? ›Use Claude to help you diet ›Use Gemini to help you diet ›AI calorie counter: photo, voice, or chat ›How logging meals by chat works ›

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