# CVE Lookup by ID (NVD)

> CVE Lookup by ID (NVD) is a paid API for AI agents from etherealgoodsco.store, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Looks up a CVE by its ID from the National Vulnerability Database, returning CVSS score, severity rating, and description.

## Facts

- Endpoint: POST https://etherealgoodsco.store/security/cve-lookup
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cve-lookup-by-id-nvd-c96c68e3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FNsSqrIp0MVsAQUhn59CJ

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 cve-lookup-by-id-nvd-c96c68e3 -d '<json body>'
```

Example prompt: Can you look up CVE-2021-44228 for me and tell me its CVSS score, severity level, and what the vulnerability is about?

## When to prefer this

Use this endpoint when you need quick structured CVE metadata (score, severity, description) from the authoritative NVD source for a known CVE ID. Prefer this over general web search when you need machine-readable CVSS scores for automated triage, alerting, or report generation.

## Known failure modes

- CVE ID not found in NVD — returns 404 or empty result
- Malformed CVE ID format causes validation error
- NVD upstream unavailable — returns timeout or 503
- CVE exists but has no CVSS score yet (newly published) — partial data returned

## How this service works

CVE lookup by ID from NVD (CVSS score, severity, description)

## Output

Returns structured CVE data from the NVD including the CVSS base score (numeric), severity label (e.g. LOW, MEDIUM, HIGH, CRITICAL), and a human-readable description of the vulnerability and affected software.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [],
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cve-lookup-by-id-nvd-c96c68e3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from etherealgoodsco.store](https://www.zero.xyz/host/etherealgoodsco.store/llms.txt)