# The Nervous System - x402 API (Levels Of Self)

External governance layer for agent systems, by Arthur Palyan dba Levels Of Self.
Pay-per-call over the x402 protocol. USDC on Base (eip155:8453). No signup, no API keys.

## Paid endpoints
- GET https://api.100levelup.com/x402/verify-audit
  Price: $0.005 USDC per call.
  Read-only Nervous System audit-trail chain verification. Returns JSON.
  x402 v2 (PAYMENT-SIGNATURE header) and v1 (X-PAYMENT header) both accepted.

- POST https://api.100levelup.com/x402/audit-mcp
  Price: $0.05 USDC per call.
  MCP config security lint: paste an MCP client config JSON, get a scored risk audit. Returns JSON.

- POST https://api.100levelup.com/x402/legal-prep
  Price: $0.25 USDC per call.
  Legal-prep by a certified agent (LOS-CA-0002). Modes: explain, doc_review, draft, questions.
  Assistance only, never advice; every response ends with a disclaimer. Text up to 20000 chars.

## Discovery
- OpenAPI: https://api.100levelup.com/openapi.json
- Listed on: x402scan, 402 Index (402index.io), Poncho (tryponcho.com)

## About
The Nervous System provides governance, attribution, and coordination for
multi-vendor agent systems. npm: mcp-nervous-system.
Site: https://levelsofself.com
Contact: ArtPalyan@LevelsOfSelf.com