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$ curl https://api.ffraud.com/public/ip/185.220.101.34
No key and no signup for single lookups.
Rebuilt every 30 minutes
1.5M
flagged IPs in the current build, made 11 October 2026, 02:30 UTC.
How fraud detection works, what our signals mean, and how to use the free API and the open data.
July 3, 2026 · 5 min read · Guides
fail2ban only knows the IPs that already attacked you. Wire it to a shared, free abuse database to block attackers early, and each ban protects the next person.
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July 2, 2026 · 5 min read · Threat intel
What a fraud score of 95 actually means. We walk one real C2 server through every signal FFraud saw, and why the score landed where it did.
July 2, 2026 · 4 min read · Email
Throwaway inboxes are the cheapest way to fake an account. Here are two free ways to stop them: one API call, or a local list you never have to call at all.