NyxSec

NYX Guard is a prototype that helps protect AI invoice agents from unsafe payment decisions. It uses Meta models to plan tasks, extract invoice data, and review suspicious content. A separate test bank selects recipients from a trusted registry and checks payment limits and duplicates. In eight paired development trials on synthetic invoices, the naive agent recorded payments in four of six risk trials. NYX Guard recorded zero. Both systems paid the ordinary invoice in both trials. In a fresh run on the same invoice with conflicting totals, the naive agent recorded a payment of 875,000 UZS, while NYX Guard sent the invoice for manual review with zero ledger entries. All payments are simulated.