Interpret a domain before you trust it.
Entropy0 converts DNS, WHOIS, SSL/TLS, network, and behavioral signals into explainable trust intelligence — for security pipelines, AI agents, and any system that touches the open web.
Public API. Deterministic scoring. Bounded validity.
150 lookups/month free. No credit card.
Every evaluation preserves independent trust dimensions.
No collapsed verdict — three separate signals with confidence and coverage per dimension.
DNS consistency, SSL validity, WHOIS age, registrar context, and network hygiene — consolidated into a single structural integrity score.
TLD risk, phishing keywords, domain age, brand impersonation, deceptive content patterns, and corroboration from external intel feeds.
How far this domain sits from typical infrastructure patterns, scored against heavy-tail distribution baselines.
One call between retrieval and trust
Drop Entropy0 into any agent loop or RAG pipeline. Evaluate before you fetch, before you synthesize, before you act.
// Before your agent trusts any external URL const trust = await fetch("https://entropy0.ai/api/v1/decide", { method: "POST", headers: { "X-API-Key": "sk_ent0_xxxx" }, body: JSON.stringify({ target: { type: "domain", value: sourceDomain }, interaction: { kind: "fetch", mode: "read_only", sensitivity: "medium" }, policy: { profile: "balanced" }, }), }).then(r => r.json()); if (trust.decision.recommended_action === "proceed") { // safe to retrieve and add to model context ragContext.push(await scrape(sourceDomain)); }
Designed for platforms that require explainable decisions
Context layer for AI
Your agent fetches a URL. Entropy0 scores it before your model trusts it. One API call between retrieval and synthesis — structured action guidance, not a heuristic guess.
Signals, not verdicts
Entropy0 surfaces evidence. Your judgment closes the loop. No "safe" or "unsafe" labels — only scored signals with explainable reasons.
Uncertainty is visible
Coverage and confidence are first-class outputs, not footnotes. Missing data is reported as a signal gap, not a clean pass.
Built for accountability
Every score is tied to observable evidence. Outputs include bounded validity windows, confidence levels, and human escalation signals — auditable and defensible.
Start with 150 free lookups.
No credit card. API key in 30 seconds. Works with any HTTP client, LangChain, or Express.