Security & Identity APIs

RIPE NCC RIPEstat - ASN info, IP prefix data, routing status, and network abuse contacts

CVE search and lookup with CPE matching and exploit references.

Google Public DNS - resolve any domain via DNS-over-HTTPS with full record type support

RDAP/WHOIS domain registration data - registrar, dates, nameservers, and contact info

Check URLs against PhishTank's crowdsourced phishing database.

Quick open port and service detection for any IP address.

Certificate Transparency log search - find all SSL/TLS certificates for a domain

Malware URL database lookups and threat intelligence.

National Vulnerability Database: CVE search, CVSS scores, and vulnerability intelligence