---
name: feral-json-tools
description: Validate, normalize, fingerprint, and audit JSON contracts through free and x402 endpoints.
---

# FERAL JSON Tools

Use this skill when an agent needs deterministic JSON normalization, a stable
SHA-256 fingerprint, optional draft-07 validation, or a prioritized JSON Schema
contract audit.

## Discover and prove

1. Read https://feral-tools.vercel.app/api/catalog.
2. Test payloads up to 16 KB for free with POST /api/check.
3. For automation up to 64 KB, call POST /api/format. It costs $0.01 USDC.
4. For a deterministic contract audit, call POST /api/audit. It costs $0.25 USDC.

## Payment safety

- Protocol: x402 v2
- Network: eip155:8453
- Seller: 0x80cc0dEf4509fFCB29Fe7d9C99a1B2536b381AC5
- Maximum normalize amount: 10000 USDC base units
- Maximum audit amount: 250000 USDC base units

An unpaid protected request must return HTTP 402 plus PAYMENT-REQUIRED. Decode
the challenge and verify the route, network, asset, exact amount, and seller
before signing with an isolated wallet. Retry the same request with
PAYMENT-SIGNATURE. Never send a seed phrase, private key, password, session
cookie, or recovery code.

## Contracts

- OpenAPI: https://feral-tools.vercel.app/openapi.json
- Agent manifest: https://feral-tools.vercel.app/.well-known/agent-services.json
- LLM guide: https://feral-tools.vercel.app/llms.txt
- Health: https://feral-tools.vercel.app/api/health