GGuardian

FIRST EPSS API

FIRST.org EPSS API: exploit prediction score for a CVE.

Operational

Last checked · response time 19 ms

90-day uptime

90 days ago60d ago30d agoToday

Monitoring since · 32 days of data

OperationalDegradedOutageNo data

Recent changes

No changes detected in 32 days of monitoring (since 2026-06-11).

Integrate

The live status, 90-day uptime figure and change history on this page are also machine-readable: embed the badge, poll the JSON, or subscribe to the feed. No key needed.

Status badge: FIRST EPSS API status badge

Markdown embed: [![FIRST EPSS API status](https://guardiandev.ai/apis/epss-api/badge.svg)](https://guardiandev.ai/apis/epss-api)

Machine-readable: JSON (versioned v1, CORS-enabled) · Atom feed of drift & outage events.

Guardian probes https://api.first.org/data/v1/epss?cve=CVE-2021-44228 about every 5 minutes. How Guardian measures.