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csjoblom

musclesworked-mcp

by csjoblom
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TypeScript
Remote

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 <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

Install Server
A
security – no known vulnerabilities
A
license - permissive license
-
quality - not tested

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