Yes, Cronometer is free to use.

How do I install Cronometer?

Cronometer is a remote plugin. You do not need to install anything locally. Add the server URL to your AI app's MCP configuration and you are ready to go.

Is Cronometer safe to use?

Yes. Cronometer passed MCP Marketplace's automated security scan with a score of 9.5/10 (low risk). Every server on MCP Marketplace is security-scanned before it's listed; see the full security report on this page for the findings and permissions.

What AI apps work with Cronometer?

Cronometer uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Cronometer MCP Server

by Atticoos

Developer ToolsLow Risk9.5MCP RegistryRemote

Free

Server data from the Official MCP Registry

Review nutrition, log meals, and manage foods and recipes in your Cronometer account.

About

Review nutrition, log meals, and manage foods and recipes in your Cronometer account.

Remote endpoints: streamable-http: https://mcp.cronometer-mcp.dev/mcp

Security Report

9.5

Low Risk9.5Low Risk

Valid MCP server (1 strong, 1 medium validity signals). 1 known CVE in dependencies Imported from the Official MCP Registry.

Endpoint verified · Requires authentication · 2 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Found in Source Code

Found by scanning the linked source code. This listing connects to a hosted endpoint, so none of this runs on your machine: it describes what the server software does where it is hosted.

file_system

Applies to the server that hosts this plugin, not to your machine.

HTTP Network Access

Connects to external APIs or services over the internet.

How to Connect

Remote Plugin

No local installation needed. Your AI client connects to the remote endpoint directly.

Add this to your MCP configuration to connect:

{
  "mcpServers": {
    "io-github-atticoos-cronometer-mcp": {
      "url": "https://mcp.cronometer-mcp.dev/mcp"
    }
  }
}

Documentation

View on GitHub

From the project's GitHub README.

Cronometer MCP

Connect your AI assistant to Cronometer to review your nutrition, log meals, and explore your tracking history in conversation.

Cronometer MCP is an unofficial Model Context Protocol (MCP) server that gives compatible assistants access to your Cronometer account. It supports reading your data and making changes to your food diary, custom foods, and recipes.

What you can do

Review your nutrition: see your food diary, calories consumed and remaining, and tracked macro and micronutrient totals.
Log and manage meals: search Cronometer's food database, add or delete food entries, copy the previous day's entries, and mark days complete or incomplete.
Create foods and recipes: save a custom food from nutrition information or build a recipe from ingredients.
Explore your history: retrieve macro targets, fasting history and statistics, and biometric trends such as weight or body fat.
Retrieve exports: access daily nutrition summaries, food servings, exercises, biometrics, and notes for a date range.

Connect your assistant

You need a Cronometer account and an MCP client that supports remote HTTP servers with OAuth authentication.

Add a remote MCP server in your assistant's MCP connection settings.
Enter the server URL:
```
https://mcp.cronometer-mcp.dev/mcp
```
Review the requested read and write access, then complete the browser sign-in flow with your Cronometer username, password, and one-time code if required.
Return to your assistant and ask it to check the connection or retrieve today's food diary.

Connection settings and tool permissions vary by client. If you need to run your own server, follow the self-hosting guide.

About the npm package: npx cronometer-mcp currently runs a placeholder server with only a status tool. Use the remote server described here for Cronometer data tools. See the package README for its current status.

Try asking

“What have I eaten today, and how many calories do I have left?”
“Show my protein, fiber, and sodium totals for yesterday.”
“Find cooked brown rice and log 150 grams for lunch today.”
“Create a recipe from 200 grams of chicken breast and 150 grams of cooked rice.”
“How has my weight changed over the last 30 days?”
“Summarize my fasting history for the past month.”
“Retrieve my daily nutrition summaries for the last seven days.”

Available answers depend on what you track in Cronometer. Your assistant can use food search and serving details to identify foods before logging them.

Account access and privacy

During sign-in, the MCP server receives your Cronometer credentials and exchanges them with Cronometer for sessions. Your password and one-time code are not stored or included in MCP tokens; upstream sessions are stored in encrypted OAuth grant properties. Use a server operator you trust with your account access.

Data returned by tools becomes available to your assistant and is subject to that client's data handling policies. Write tools can change your Cronometer account, including deleting existing food entries, creating custom foods and recipes, copying diary entries, and marking days complete or incomplete. Review your client's tool permissions before allowing changes.

The sign-in screen requests read and write access. The OAuth scope is still named cronometer:read for compatibility with existing clients. Despite that legacy name, it does not enforce read-only access: an authorized connection has access to all the tools listed below. There is currently no read-only connection mode. You can revoke the MCP connection at any time.

If a Cronometer session expires, follow the sign-in prompt from your MCP client, then retry the tool. The server discards your password after sign-in.

Available tools

Area	Tools
Connection	`connection_status`
Food diary	`get_food_log`, `add_food_entry`, `remove_food_entry`, `copy_day`, `mark_day_complete`
Nutrition and food search	`get_daily_nutrition`, `search_foods`, `get_food_details`
Custom foods and recipes	`add_custom_food`, `add_recipe`
Targets	`get_macro_targets`
Fasting	`get_fasting_history`, `get_fasting_stats`
Biometrics	`list_biometrics`, `get_biometrics`
Data exports	`get_cronometer_data`

Limits and troubleshooting

Expired connection: if your client does not show a sign-in prompt, reconnect the MCP server in your client and sign in again.
Missing nutrients: daily nutrition totals include nutrients with targets set in your Cronometer account.
Dates: tools accept YYYY-MM-DD dates. Diary tools with an optional date default to today in your account's timezone.
Copying a day: copy_day adds the previous day's entries to the destination date and keeps existing entries. Repeating it can create duplicates.
Export limits: each export covers at most 31 inclusive days and returns up to 1,000 rows. Shorten the range if a result is truncated. Exports count toward Cronometer's limited daily export allowance (roughly 10 per day); the mobile data tools do not use that allowance.
Service changes: this project uses Cronometer's private mobile and web APIs. Changes to those APIs may temporarily break features.

Development and self-hosting

See the development guide for local setup, Cloudflare deployment, authentication details, secrets, and CI configuration. The mobile API contract is maintained in specs/cronometer-mobile.yaml.

Acknowledgments

The mobile API integration is a TypeScript port of rwestergren/cronometer-api-mcp (MIT). The CSV export protocol was independently implemented using jrmycanady/gocronometer as a reference. See the development guide for implementation and licensing notes.

License

MIT. Notices for ported third-party code are in THIRD_PARTY_NOTICES.

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