Fabraix›Fabraix› offers Nyx

Nyx is an autonomous offensive AI agent that tests customer-facing AI agents. It runs pure-blackbox, requiring only a reachable endpoint, URL, or phone number, and reasons across turns while adapting its strategy to the target's behavior. It draws on a library of more than 10,000 adversarial strategies and supports text, voice, image, browser, and document interaction surfaces, deploying test websites and files on the fly.

Nyx reports each finding with reproduction steps and an AIVSS-scored severity, and can be run continuously in CI/CD or as a one-off audit. Most users drive it through the @fabraix/nyx CLI or the api.fabraix.com REST endpoints. It is offered under free research, per-scan, continuous, and enterprise tiers.