Muscles Worked MCP Server - install & status [2026]

01 · Install Muscles Worked

before you install - you'll need

Set MUSCLESWORKED_API_KEY before connecting.

Claude Code

claude mcp add csjoblom-musclesworked-mcp -- npx -y musclesworked-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "csjoblom-musclesworked-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "musclesworked-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package musclesworked-mcp - unscoped; check the name against the project README before installing

registry namespace io.github.csjoblom is GitHub-verified and matches the repo owner

03 · What Muscles Worked can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can 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, and find alternative exercises ranked by muscle overlap.

Capability map

Tools grouped from the project's README - what Muscles Worked lets an agent do.

Muscles

2 tools - e.g. Get primary, secondary, and stabilizer muscles for an exercise; Search muscles by name to discover IDs

get_muscles_worked · search_muscles

Exercises

2 tools - e.g. Find exercises targeting a specific muscle with optional filters; Search exercises by name to discover IDs

find_exercises · search_exercises

Analyze

1 tool - e.g. Analyze a workout for coverage, gaps, and imbalances

analyze_workout

read & search

1 tool - e.g. Find alternative exercises ranked by muscle overlap

get_alternatives

04 · Who maintains Muscles Worked

MusclesWorked is maintained by csjoblom. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository: github.com/csjoblom/musclesworked-mcp
category: other - ranked #634 of 848 actively-maintained other servers as of 2026-08-25.
registry: io.github.csjoblom/musclesworked (active, first published 2026-02-17)
packages: npm:musclesworked-mcp

06 · Muscles Worked FAQ

Is Muscles Worked still maintained?

Yes - as of 2026-08-25, its last commit was 2026-02-17. We re-verify nightly.

What can Muscles Worked do?

With this server connected, an agent can 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, and find alternative exercises ranked by muscle overlap.

How do I install Muscles Worked?

Run `npx -y musclesworked-mcp`. The README documents one environment variable (MUSCLESWORKED_API_KEY) to set first. Set MUSCLESWORKED_API_KEY before connecting. You can also paste the ready-made client config above.

Does Muscles Worked run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Muscles Worked

Alternatives to Muscles Worked

Maintained other servers if Muscles Worked isn't the fit.

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