SOCRadar’s article showcases 20 free cybersecurity APIs in five categories. Threat Intelligence APIs include AbuseIPDB, BinaryEdge, EmailRep, Pulsedive, and ThreatMiner. Domain/URL Security features Google Safe Browsing, PhishTank, URLhaus, urlscan.io, CriminalIP, and IP ASN History. Vulnerability APIs include the National Vulnerability Database, CVE Search, and Vulners. For malware analysis, options are VirusTotal, Hybrid Analysis, Malshare, and MalwareBazaar. Other security APIs include HaveIBeenPwned and SSL Labs. These free tools enable security automation with usage limitations, complementing SOCRadar’s specialized commercial APIs.