Exercise-to-muscle mapping: 856 exercises, 65 muscles, workout analysis & alternatives.
Connect MusclesWorked to Claude, Cursor or any other MCP client and it stops being a tab you switch to. Exercise-to-muscle mapping: 856 exercises, 65 muscles, workout analysis & alternatives. The musclesworked mcp server is what makes that connection.
MCP server for the musclesworked.com exercise-to-muscle mapping API.
musclesworked-mcp on npm is all you need. Most clients run it directly, so configuration is a few lines and a restart.
The toolset is worth reading before you wire it up, because it tells you what the integration is really for:
get_muscles_worked — Get primary, secondary, and stabilizer muscles for an exercisefind_exercises — Find exercises targeting a specific muscle with optional filtersanalyze_workout — Analyze a workout for coverage, gaps, and imbalancesget_alternatives — Find alternative exercises ranked by muscle overlapsearch_exercises — Search exercises by name to discover IDssearch_muscles — Search muscles by name to discover IDsCursor — The Cursor tool exposed by this serverConfiguration is passed through the environment: MUSCLESWORKED_API_KEY, MUSCLESWORKED_API_URL. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. MusclesWorked's toolset — get_muscles_worked, find_exercises, analyze_workout and 4 more — is a fair guide to whether it matches your workflow. It is maintained by csjoblom; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| 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 |
| Cursor | The Cursor tool exposed by this server. |
{
"mcpServers": {
"musclesworked": {
"command": "npx",
"args": ["-y", "musclesworked-mcp"],
"env": {
"MUSCLESWORKED_API_KEY": "mw_live_..."
}
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| MUSCLESWORKED_API_KEY | Credential the server authenticates with. | Yes |
| MUSCLESWORKED_API_URL | Endpoint or connection string the server talks to. | Yes |
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