EPSS 30-Day Score History for a CVE

epss/cve-score-history

The Exploit Prediction Scoring System (EPSS) score of one CVE for each of the last 30 days: the latest probability and percentile, plus a daily series of both, newest first. Use it to see whether the likelihood of exploitation is rising or falling. Give one CVE id. A CVE with no score returns an empty list. Scores and percentiles are decimal strings. EPSS is maintained by the Forum of Incident Response and Security Teams (FIRST), https://www.first.org/epss, passed through unmodified and served by Eden Engine; not an official FIRST product.

activeper callv1

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $0.50.

Data source

Forum of Incident Response and Security Teams (FIRST)

EPSS scores come from the Exploit Prediction Scoring System (EPSS), maintained by the Forum of Incident Response and Security Teams (FIRST), https://www.first.org/epss, which asks users to credit EPSS and FIRST. Passed through unmodified and served by Eden Engine; this is not an official FIRST product, and FIRST does not endorse it.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "epss/cve-score-history" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "epss/cve-score-history" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "epss/cve-score-history", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "epss/cve-score-history", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

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Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 26, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "cve"
  ],
  "properties": {
    "cve": {
      "type": "string",
      "pattern": "^CVE-[0-9]{4}-[0-9]{4,19}$",
      "description": "One CVE id, for example CVE-2022-22965."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "total",
    "offset",
    "limit",
    "data"
  ],
  "properties": {
    "data": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "cve",
          "epss",
          "percentile",
          "date",
          "time-series"
        ],
        "properties": {
          "cve": {
            "type": "string",
            "description": "CVE identifier."
          },
          "date": {
            "type": "string",
            "description": "Date the score was published, YYYY-MM-DD."
          },
          "epss": {
            "type": "string",
            "description": "Probability, as a decimal string between 0 and 1, that the CVE is exploited in the wild in the next 30 days."
          },
          "percentile": {
            "type": "string",
            "description": "Share of all scored CVEs with an EPSS score at or below this one, as a decimal string between 0 and 1."
          },
          "time-series": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "epss",
                "percentile",
                "date"
              ],
              "properties": {
                "date": {
                  "type": "string",
                  "description": "Day of the score, YYYY-MM-DD."
                },
                "epss": {
                  "type": "string",
                  "description": "Probability of exploitation in the next 30 days, as a decimal string."
                },
                "percentile": {
                  "type": "string",
                  "description": "Percentile among all scored CVEs, as a decimal string."
                }
              },
              "additionalProperties": true
            },
            "description": "Daily scores for the 30 days before the latest, newest first."
          }
        },
        "additionalProperties": true
      },
      "description": "The scores."
    },
    "limit": {
      "type": "integer",
      "description": "Most scores the page could hold."
    },
    "total": {
      "type": "integer",
      "description": "Scores matching the query in the whole data set."
    },
    "offset": {
      "type": "integer",
      "description": "Index of the first score returned."
    },
    "status": {
      "type": "string",
      "description": "Service status, OK on success."
    }
  },
  "additionalProperties": true
}