Nervous System MCP Server

Deterministic governance lint for MCP server configurations, plus reference tooling for the 7 rules. It runs locally over stdio via the published package.

People who work with ai safety, agent skills and governance and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in JavaScript.

VERIFIED ACTIVE

LAST COMMIT 2026-07-17 · ★ 4 · #455 OF 945 MAINTAINED OTHER · VERIFIED 2026-09-18

MIT · JavaScript servers · how we verify → /methodology

01 · Install Nervous System

Claude Code

claude mcp add levelsofself-mcp-nervous-system -- npx -y mcp-nervous-system

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "levelsofself-mcp-nervous-system": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-nervous-system"
      ]
    }
  }
}

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 mcp-nervous-system - unscoped; check the name against the project README before installing

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

03 · What Nervous System can do

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

Latest releases

v1.1.0 · 2026-03-04

3 new tools: emergency_kill_switch, verify_audit_chain, dispatch_to_llm. 11 total tools.

04 · Who maintains Nervous System

nervous-system is maintained by levelsofself. We track 3 MCP servers from levelsofself - 3 actively maintained, 4 combined GitHub stars, oldest repo from Feb 2026.

05 · Facts

repository: github.com/levelsofself/mcp-nervous-system
category: other - ranked #455 of 945 actively-maintained other servers as of 2026-09-18.
registry: io.github.levelsofself/nervous-system (active, first published 2026-03-04 · 4 versions)
packages: npm:mcp-nervous-system

06 · Nervous System FAQ

What is Nervous System?

Deterministic governance lint for MCP server configurations, plus reference tooling for the 7 rules. It runs locally over stdio via the published package.

Is Nervous System still maintained?

Yes - as of 2026-09-18, its last commit was 2026-07-17. We re-verify nightly.

How do I install Nervous System?

Run `npx -y mcp-nervous-system`. You can also paste the ready-made client config above.

Does Nervous System 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 Nervous System

Alternatives to Nervous System

Maintained other servers if Nervous System isn't the fit.

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