Body Lab

Body Lab MCP server

Connect Claude, ChatGPT, or any assistant that speaks the Model Context Protocol to your Body Lab training. Ask what to do today and why, how last week went, whether you're recovered, or what your squat has been doing, and the answers come from your own data and Body Lab's engine.

https://bodylab.lol/mcp

This repository is the public home of the server: how to connect, the tool reference, the MCP Registry entry, and a Claude Code plugin. The server itself runs at the address above. It's hosted, so there's nothing to install or run.

Connect

You need a Body Lab account. The first time an assistant connects, it sends you to Body Lab to sign in and approve it.

Body Lab isn't listed in assistants' app directories yet, so you add it by its address.

Claude (web, desktop, mobile):

1. On claude.ai or in Claude Desktop, open Customize → Connectors.
2. Press +, choose Add custom connector, paste https://bodylab.lol/mcp and press Add.
3. Press Connect, then sign in to Body Lab and allow Claude.
4. In a chat, turn Body Lab on from + → Connectors. It's then available in the Claude mobile app too.

On a Team or Enterprise plan, an organization owner adds it first (Organization settings → Connectors). The free plan allows one custom connector. See Anthropic's custom connector guide.

ChatGPT (web; Plus, Pro, Business, Enterprise or Education):

1. Open Settings → Security and login and turn on Developer mode.
2. Open Plugins, press +, and create an app with https://bodylab.lol/mcp, using OAuth.
3. Sign in to Body Lab and allow ChatGPT.
4. In a chat, choose Body Lab from Developer mode in the message box.

See OpenAI's developer mode guide.

Claude Code:

claude mcp add --transport http body-lab https://bodylab.lol/mcp

Then run /mcp inside Claude Code and choose Body Lab to sign in. Or install the plugin, which adds the server and skills for using it well:

/plugin marketplace add bodylab-lol/mcp

/plugin install body-lab@bodylab-lol

VS Code, Cursor and other clients: add a remote (Streamable HTTP) MCP server with the URL https://bodylab.lol/mcp. For clients configured with JSON:

{

"mcpServers": { "body-lab": { "type": "http", "url": "https://bodylab.lol/mcp" } } }

What it can do

An assistant can see your training. With your permission it can also tell Body Lab about today, put sessions you've arranged and strength routines you've chosen on your calendar and take them off again, add races and goals at priority B or C, see your lab results and add new ones, for example from a PDF or photo of a lab report, do the same with body composition scans such as DEXA, and read or record your daily updates: how you felt and what happened the night before, and the patterns Body Lab finds in them. It can't change your training history, delete anything, or make an event the A race your plan is built around — that's yours to do in Body Lab.

Prompts: What should I do today? (todays-session) and Review my week (weekly-review).

Full reference, with every argument: TOOLS.md. Machine-readable, with input and output schemas: tools.json.

Your data and permissions

Every connection can see your training (training:read). Daily updates, lab results and body composition scans are separate from it and from each other, and each is off unless you turn it on when you approve an assistant:

schedule:write covers sessions you've arranged and strength routines you've chosen, and nothing Body Lab prescribed: a withdrawn session stays on record, marked withdrawn. A routine names exercises from Body Lab's catalogue only, so an assistant can't add an exercise of its own, and any weight it states is shown to you in the strength runner before you lift, with a note when it's well above what you've logged. events:write adds races and goals at B or C only; making one your A race, editing it, or removing it stays in Body Lab, so an assistant can't restructure months of your plan or delete a race by mistake. Every session or event an assistant adds is recorded as that assistant's, and each assistant is held to a rolling limit on how much it can schedule.

An assistant you already allowed to schedule sessions can put strength routines on your calendar too, without reconnecting: they come under the same permission. Otherwise, an assistant you connected before these existed doesn't get them automatically, and one you allowed for lab results doesn't get body composition. To allow any of them, connect it again (in Claude, disconnect and reconnect Body Lab) and tick those boxes when Body Lab asks. To correct or delete a lab result, to remove a scan, or to change or remove a race, use Body Lab on the web.

Body composition scans, including bone density, are measurements you recorded. Body Lab shows them back to you and nothing more: they are not a diagnosis, a whole-body scan is not a diagnostic bone density test, and nothing Body Lab prescribes reads them.

• When you approve an assistant, Body Lab shows who pub