How to Connect PlateLens to Claude with MCP

PlateLens implements the Model Context Protocol, so an AI assistant can read your nutrition, activity and weight history and reason about it. Every tool is read-only, access is granted over OAuth 2.0, and you can revoke it at any time. It works as a custom connector in Claude and as a nutrition MCP server for any MCP client. Here is how to connect it and what you can actually ask once you do.

What Claude can see once connected

The server exposes exactly eight read-only tools — there is no general-purpose “query my data” tool. Together they cover your current targets, any day’s nutrition and hydration summary, your logged meals down to the ingredient, nutrition trends over up to 90 days, steps and activity, a year of weight trend, and the energy-balance ledger (intake vs. estimated expenditure) by day, week, month or year.

What it deliberately cannot do: log or edit meals, change your goals, delete anything, read your photos, voice notes or coach chats, or look at any account other than the one that signed in. Dates and “today” use the timezone configured in PlateLens, and days you did not log stay marked as missing rather than being counted as zero.

Add the custom connector in Claude (web, desktop or mobile)

1. In Claude, open Settings → Connectors.
2. Choose Add custom connector.
3. Enter the endpoint: https://mcp.platelens.app/mcp
4. Leave client ID and secret empty — registration is automatic.
5. Press Connect and sign in with the same Google or Apple account you use in PlateLens.
6. Approve the permissions shown, then enable PlateLens from the connectors menu of a conversation.

On Team or Enterprise plans, an organization owner needs to add the connector in the organization settings first. Exact menu names can shift as Claude evolves; the connector endpoint is permanent.

Connect it in Claude Code

One command per project — or add --scope user to have it in every project:

claude mcp add --transport http platelens https://mcp.platelens.app/mcp

Then run /mcp inside Claude Code, pick platelens, authenticate, and the eight tools appear.

ChatGPT

Today the connection in ChatGPT uses Developer Mode: enable it under Settings, create a developer-mode app, and point it at the same endpoint with the same OAuth sign-in.

Things worth asking

• “What are my current PlateLens calorie, macro, hydration, step, and target-weight goals?”
• “Summarize my nutrition, hydration and activity for July 20, then show that day’s energy-balance breakdown against my plan.”
• “List my meals from July 20, then show the ingredients and nutrition for the chicken bowl.”
• “Show my calories and protein trend from July 1 to July 14 — and distinguish unlogged days from zero intake.”
• “Compare my weight trend over the last two weeks with my current target.”

Because the assistant sees targets, meals, trends and the energy ledger together, the interesting questions are the cross-cutting ones: whether your protein dips on weekends, how your deficit compares against plan over a month, which logged meals carry most of your sodium.

Privacy, in plain terms

The assistant receives only the result of the specific read it requests during a conversation — PlateLens never pushes data to it. Access is granted scope by scope (profile, nutrition, activity, weight), and the connection page shows which categories you are approving. It never receives your email, name, location, subscription status, coach conversations, notes, photos or audio. Access credentials expire after 10 minutes; unused connections expire after 90 days.

To disconnect: More → Preferences → Connected Apps in the PlateLens app, or auth.platelens.app in a browser. Each connection is revoked separately, revocation takes effect from the next request, and disconnecting never affects your PlateLens login. No paid plan is required. The MCP server is rolling out to PlateLens accounts — if the connection is not available to yours yet, it is because new authorizations are still being opened up in stages.

Full technical reference — endpoint, scopes, the complete tool table and FAQ — on the MCP server page. How your data is handled is covered in the privacy policy.