MusclesWorked

Name: MusclesWorked
Author: csjoblom

by csjoblomversion 0.1.0i★ –iRuns on your computer

Registry nameio.github.csjoblom/musclesworked

Install

Overview

Description from the maker (original English)

Exercise-to-muscle mapping: 856 exercises, 65 muscles, workout analysis & alternatives.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiVery new↓ 37/wk · ★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Clinics & health
You need to fill in: MUSCLESWORKED_API_KEY

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: MUSCLESWORKED_API_KEY

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "musclesworked": {
      "command": "npx",
      "args": [
        "-y",
        "musclesworked-mcp"
      ],
      "env": {
        "MUSCLESWORKED_API_KEY": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add musclesworked --env MUSCLESWORKED_API_KEY=your-value -- npx -y musclesworked-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "musclesworked": {
      "command": "npx",
      "args": [
        "-y",
        "musclesworked-mcp"
      ],
      "env": {
        "MUSCLESWORKED_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "musclesworked": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "musclesworked-mcp"
      ],
      "env": {
        "MUSCLESWORKED_API_KEY": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

MUSCLESWORKED_API_KEY secret required env
Your MusclesWorked API key (get one at musclesworked.com/dashboard)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account csjoblom, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Clinics & healthi

More stars than 0% of the other 1027 servers in this category
Published to the registry more recently than 1% of the other 1027 servers in this category
Basic checks equal to or better than 100% of the other 1027 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is MusclesWorked safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: MUSCLESWORKED_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 9 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Mirobody, FHIR MCP Server, Google Health MCP

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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Lab results to LOINC codes and UCUM units, symptoms and diagnoses to ICPC-3. Offline, no API key.

by thetahealthGrowing↓ 290/wk★ 1.4KUpdated yesterday

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Google Health MCP

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

musclesworked-mcp

MCP server for the musclesworked.com exercise-to-muscle mapping API.

Connects Claude Desktop, Claude Code, Cursor, and other MCP clients to 856 exercises and 65 muscles with detailed primary/secondary/stabilizer activation data across 14 muscle groups.

Setup

Get an API key at musclesworked.com/dashboard.

Claude Desktop

Add to your claude_desktop_config.json:

"mcpServers": { "musclesworked": { "command": "npx", "args": ["-y", "musclesworked-mcp"], "env": { "MUSCLESWORKED_API_KEY": "mw_live_..." } } } }

Claude Code

claude mcp add musclesworked -- npx -y musclesworked-mcp --api-key mw_live_...

Or add to .mcp.json:

"mcpServers": { "musclesworked": { "command": "npx", "args": ["-y", "musclesworked-mcp", "--api-key", "mw_live_..."] } } }

Cursor

Add to .cursor/mcp.json:

"mcpServers": { "musclesworked": { "command": "npx", "args": ["-y", "musclesworked-mcp"], "env": { "MUSCLESWORKED_API_KEY": "mw_live_..." } } } }

Tools

Tool	Description
`get_muscles_worked`	Get primary, secondary, and stabilizer muscles for an exercise
`find_exercises`	Find exercises targeting a specific muscle with optional filters
`analyze_workout`	Analyze a workout for coverage, gaps, and imbalances
`get_alternatives`	Find alternative exercises ranked by muscle overlap
`search_exercises`	Search exercises by name to discover IDs
`search_muscles`	Search muscles by name to discover IDs

Example Prompts

"What muscles does the barbell bench press work?"
"Find bodyweight exercises for my chest"
"Analyze my push day: bench press, overhead press, tricep pushdown, lateral raise"
"What are some alternatives to barbell squats?"
"Search for exercises that target the hamstrings"

Configuration

Option	Description
`--api-key`	API key (or set `MUSCLESWORKED_API_KEY` env var)
`MUSCLESWORKED_API_URL`	Override base URL (default: `https://musclesworked.com`)

Development

git clone https://github.com/csjoblom/musclesworked-mcp.git

cd musclesworked-mcp npm install npm run build

Test with MCP Inspector

MUSCLESWORKED_API_KEY=mw_live_... npx @modelcontextprotocol/inspector node dist/index.js

License

MIT

MusclesWorked

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Clinics & healthi

Common questions

Alternatives

Mirobody

FHIR MCP Server

Google Health MCP

README from the maker

musclesworked-mcp

Setup

Claude Desktop

Claude Code

Cursor

Tools

Example Prompts

Configuration

Development

Test with MCP Inspector

License