AbuseIPDB

Provides an API to check IP addresses against a database of reported abuse and to submit reports of malicious IP activity.

The AbuseIPDB API uses api key authentication; has freemium pricing; offers a free tier (Individual (Free) plan: 1,000 IP Checks & Reports/day, 100 Block Checks/day, basic blacklist up to 10,000 IPs; no credit card required); rate limits: Free accounts: 1,000 reports and checks per day; webmaster accounts: 3,000 requests/day; same IP reportable once per 15 minutes. Verified 2026-07-12 with per-field source links.