Nervous System
FreeNot checkedGovernance framework for LLM agents. Exposes seven mechanically-enforced rules plus tools for preflight file protection, audit-chain verification, session hando
About
Governance framework for LLM agents. Exposes seven mechanically-enforced rules plus tools for preflight file protection, audit-chain verification, session handoff and worklog templates, MCP config auditing, and an emergency kill switch.
README
Deterministic governance lint for MCP server configurations, plus reference tooling for the 7 rules.
What each tool actually does
| Tool | Does real work? |
|---|---|
audit_mcp_config |
Yes. Deterministic lint, zero dependencies, fully offline, never throws. Checks inline secrets in env, shell wrappers, unpinned packages, auto-install flags, broad filesystem scopes, non-TLS remote transports, unpinned docker tags. Returns findings with severities and a 0-100 score. |
check_preflight |
Yes, when configured. Reads protected_files_list from nervous-system.config.json or NERVOUS_SYSTEM_PROTECTED_LIST. With no list it says so rather than guessing. If the list is unreadable it FAILS CLOSED. |
get_* (everything else) |
No. They return text: the framework, templates, instructions. That is why they are named get_. |
Install
npx mcp-nervous-system
Free local tool: audit_mcp_config
Pass your config as config (object) or config_json (string), e.g. the contents of
claude_desktop_config.json. Returns findings with severities and a 0-100 score.
Hosted API (pay-per-call, x402, USDC on Base)
The write-capable toolset runs server-side and is not in this package.
POST https://api.100levelup.com/x402/audit-mcp- governance lint ($0.05 USDC)GET https://api.100levelup.com/x402/verify-audit- audit-chain verification ($0.005 USDC)
Discovery: /openapi.json and /llms.txt.
2.0.0 breaking changes
emergency_kill_switch->get_kill_switch_instructions. It never stopped anything.verify_audit_chain->get_audit_verification_instructions. It never verified a chain.dispatch_to_llm->get_dispatch_command. It never dispatched.check_preflightno longer matches hardcoded filenames from the author's own server. It reads your list.- Hardcoded fleet counts and violation totals removed from
get_origin_story. A number baked into a package is a fossil the moment it ships.
License
MIT
Install Nervous System in Claude Desktop, Claude Code & Cursor
unyly install nervous-systemInstalls into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.
First time? Get the CLI: curl -fsSL https://unyly.org/install | sh
Or configure manually
Run in your terminal:
claude mcp add nervous-system -- npx -y mcp-nervous-systemFAQ
Is Nervous System MCP free?
Yes, Nervous System MCP is free — one-click install via Unyly at no cost.
Does Nervous System need an API key?
No, Nervous System runs without API keys or environment variables.
Is Nervous System hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install Nervous System in Claude Desktop, Claude Code or Cursor?
Open Nervous System on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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