SniffCat
Check. Report. Defend.
We help you identify and report abusive IP addresses quickly, accurately, and with full respect for privacy. A solution built for system administrators, developers, and network engineers who need real-time, actionable abuse data. Version 0.4.0.
We probe without your API key. A 401/403 auth wall means the server is up — not a full health pass.
curl "https://api.sniffcat.com/api/v1/check?ip=1.1.1.1"const res = await fetch("https://api.sniffcat.com/api/v1/check?ip=1.1.1.1");
const data = await res.json();
console.log(data);import requests
res = requests.get("https://api.sniffcat.com/api/v1/check?ip=1.1.1.1")
print(res.json())BROWSER CALLS BLOCKED (NO CORS/HTTPS) — USE THE CURL SNIPPET
/api/v1/check?ip=1.1.1.1PROBEDCheck. Report. Defend.
We probe without your API key. A 401/403 auth wall means the server is up — not a full health pass. Export includes every documented route below.
Stable. No schema drift observed since monitoring began — the response shape has not changed under our checks.
SniffCat: common questions
Is SniffCat free to use?
Yes — SniffCat is a free security API. Free tier: . Commercial use is allowed on the free tier.
Does SniffCat need an API key?
Yes — SniffCat needs a free API key, which you pass on each request. Rate limits: Retry-After: 24s.
Can I call SniffCat from the browser?
Not directly — SniffCat doesn't send browser-friendly CORS headers, so call it from a server or proxy instead. Copy the curl or Python snippet on this page to get started.
Is SniffCat up right now?
As of our last scheduled check, SniffCat is new with 85.0% uptime over 90 days and a 290 ms median response. We re-probe it every sweep — the status badge and uptime chart above always show the latest.