Nyx
Autonomous adversarial-testing harness for AI agents: Nyx probes chatbots, autonomous, multi-agent, browser, voice and reinforcement-learning systems as a black box across multiple turns, returns findings with reproduction steps and can be run on a schedule or in CI; free for non-commercial research by application, with one-off scans and continuous plans priced by quote.
What it does
- Guardrails and safety
- Evaluation and observability
Features 4
- Black-box testingPoint Nyx at any AI system; no special access is needed.
- Multi-turn adaptive attacksReasons across turns and adapts to the agent's logic rather than firing canned prompts.
- Many modalitiesVoice, text and images, with test websites and files created on the fly.
- Findings with reproduction stepsEach finding in a scan comes with steps to reproduce and remediation guidance.
Sources
- Pricing
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Pricing content: Researchers $0 by application for non-commercial research; One-Off Scan custom, priced per agent; Continuous custom, monthly by usage; Enterprise by demo. No dollar rate card is published.
- Description
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Official documentation · 19 Oct 2026
Site content: "Nyx is an autonomous testing harness. It probes your AI agents across security, logic, and alignment."
- What it does
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Official documentation · 19 Oct 2026
Site content: "Nyx is an autonomous testing harness. It probes your AI agents across security, logic, and alignment."
- Sold within
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Self-serve sign-up and a demo booking; the paid plans are priced by quote and the researcher plan is by application.
- Name
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Official documentation · 19 Oct 2026
Name as published on the product page.
- URL
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Official documentation · 19 Oct 2026
Product page, read 2026-10-19.
- Deployment
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Official documentation · 19 Oct 2026
The pages read state no deployment model beyond the vendor-run service; saas is recorded as the vendor-operated reading.
- Interfaces
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Official documentation · 19 Oct 2026
Site content: a sign-up link to app.fabraix.com and CI/CD and scheduled scans on the Continuous plan; no SDK or API reference is described on the pages read.
Something wrong here? Send a correction — quote this product id: fabraix-nyx.