MusclesWorked
Exercise-to-muscle mapping: 856 exercises, 65 muscles, workout analysis & alternatives.
Runs on your machine from its package; the steps are below.
What it does
- Reads
- Writes
- High impact
At most: only reads or looks up information.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Runs locally over stdio
This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).
Run
npx -y musclesworked-mcp
MCP client config
{
"mcpServers": {
"musclesworked": {
"command": "npx",
"args": [
"-y",
"musclesworked-mcp"
]
}
}
}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
