# VulnFeed CVE Vulnerability Scanner with EPSS Scoring

> VulnFeed CVE Vulnerability Scanner with EPSS Scoring is a paid API for AI agents from vulnfeed-api.novadyne.ai, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Looks up a CVE by ID and returns its EPSS exploit probability score, severity ratings, and a plain-language summary

## Facts

- Endpoint: GET https://vulnfeed-api.novadyne.ai/vulnscan/cve/%7Bcve_id%7D
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vulnfeed-cve-vulnerability-scanner-with-epss-scoring-c076b62a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ulW9eAawgXpSh1TNkL-1E

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability vulnfeed-cve-vulnerability-scanner-with-epss-scoring-c076b62a
```

Example prompt: Can you look up CVE-2024-21626 and tell me its EPSS exploit probability score and severity — I need to know if it's critical enough to prioritize patching today?

## When to prefer this

Use this endpoint when you need fast, per-CVE enrichment with EPSS exploit probability scoring — especially useful in automated dependency scanning pipelines, security triage workflows, or when you need to prioritize which known CVEs to patch first based on real-world exploitation likelihood. Prefer this over generic NVD lookups when EPSS scoring is the key decision signal.

## Known failure modes

- Invalid or malformed CVE ID returns an error or ok:false
- CVE ID not found in the database returns empty or null results
- Payment failure via x402 micropayment prevents the scan from executing
- Network timeout if the vulnerability database is slow to respond
- Rate limiting if too many requests are made in a short window

## How this service works

Dependency vulnerability scanner with EPSS scoring. MCP server + x402 micropayments.

## Output

Returns an object containing the CVE ID, a boolean ok status, an EPSS object with exploit probability metrics, a plain-language summary of the vulnerability, and an array of severity ratings (e.g. CVSS scores or severity labels).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "cve_id"
 ],
 "properties": {
  "cve_id": {
   "type": "string",
   "description": "CVE or vulnerability ID (e.g. CVE-2024-1234)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "id": {
   "type": "string"
  },
  "ok": {
   "type": "boolean"
  },
  "epss": {
   "type": "object"
  },
  "summary": {
   "type": "string"
  },
  "severity": {
   "type": "array"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vulnfeed-cve-vulnerability-scanner-with-epss-scoring-c076b62a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vulnfeed-api.novadyne.ai](https://www.zero.xyz/host/vulnfeed-api.novadyne.ai/llms.txt)