OSF CVE Exploit Check (CISA KEV, EPSS, CVSS)
https://api.osf-master-server.com/x402/security/cve/:cve_idOverview
Vulnerability exploitation check by CVE id. Returns whether a CVE is actively exploited in the wild (US CISA Known Exploited Vulnerabilities catalog), its EPSS exploit probability score, and its CVSS severity, each with a provenance URL to the authoritative US government source, plus a hashed audit receipt. $0.02 USDC per check on Base. For vulnerability management, patch prioritization, threat intelligence, and DevSecOps agent workflows.