Nervous System
Governance for LLM agents: 7 enforced rules + read-only reference tools. Safe in any MCP client.
Runs on your machine from its package; the steps are below.
What it does
- Reads
- Writes
- High impact
At most: only reads or looks up information.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Runs locally over stdio
This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).
Run
npx -y mcp-nervous-system
MCP client config
{
"mcpServers": {
"nervous-system": {
"command": "npx",
"args": [
"-y",
"mcp-nervous-system"
]
}
}
}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
