LocalFree server, account needed

MusclesWorked MCP server

csjoblom/musclesworked-mcp

Exercise-to-muscle mapping: look up muscles worked by exercises, analyze workouts for gaps and find alternative exercises ranked by muscle overlap.

4 GitHub stars3 forks100 npm downloads / month
Source code

Install MusclesWorked in Claude Code

Claude Code
claude mcp add musclesworked -e MUSCLESWORKED_API_KEY=... -- npx -y musclesworked-mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "musclesworked": {
      "command": "npx",
      "args": [
        "-y",
        "musclesworked-mcp"
      ],
      "env": {
        "MUSCLESWORKED_API_KEY": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the MusclesWorked MCP server do?

Exercise-to-muscle mapping: look up muscles worked by exercises, analyze workouts for gaps and find alternative exercises ranked by muscle overlap.

Is the MusclesWorked MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does MusclesWorked run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add MusclesWorked to Claude Code?

Run: claude mcp add musclesworked -e MUSCLESWORKED_API_KEY=... -- npx -y musclesworked-mcp

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