Emerging Threats (ET) Intelligence Query API v1
The ET Intelligence Query API is Proofpoint's threat-intelligence lookup service, reached at api.emergingthreats.net. Thirty-six documented GET endpoints pivot across domains, IP addresses, malware samples (by MD5), Suricata/Snort signature IDs, CVEs, malware families, threat actors and reputation categories. Authentication is a single API key sent in the Authorization header; the default rate is 200 queries per minute per key.