Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@musclesworked-mcpAnalyze my push day: bench press, overhead press, and tricep pushdown"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
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 primary, secondary, and stabilizer muscles for an exercise |
| Find exercises targeting a specific muscle with optional filters |
| Analyze a workout for coverage, gaps, and imbalances |
| Find alternative exercises ranked by muscle overlap |
| Search exercises by name to discover IDs |
| 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 (or set |
| Override base URL (default: |
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.jsLicense
MIT
Resources
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