Nyx

Nyx is a payment security and control platform for AI agents. Agents can now pay for services and also buy the tools and data they need, but owners have no safe way to let them spend. Nyx is that control layer. The owner sets a cap per payment, a daily budget, and a list of approved vendors for each agent. A deterministic policy engine checks every payment before it settles. Payments inside the rules settle at once. Payments outside them wait for the owner to approve or deny, with a risk explanation written by Muse Spark. The model plans and explains. It never decides a payment. A built in attack lab fires live attacks, including prompt injection, at the engine to prove the controls hold.