# CVE Lookup

> CVE Lookup is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-31).

Looks up CVE vulnerability details by CVE ID or search query, returning severity and CVSS score

## Facts

- Endpoint: GET https://anibalb.duckdns.org/x402/cve-lookup?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cve-lookup-34ff042d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YBO0aGUnW8pmZU-s0RWOX

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-34ff042d
```

Example prompt: Can you look up CVE-2021-44228 and tell me its severity and CVSS v3 score?

## When to prefer this

Use this endpoint when you need quick, pay-per-call CVE lookups without setting up an API key or account. Ideal for agents that need on-demand vulnerability intelligence, especially when integrating with x402 micropayment flows on Base. Prefer this over NVD direct API calls when you want a simple, pre-normalized JSON response with severity and CVSS score in a single request.

## Known failure modes

- CVE ID not found in database returns an error or empty result
- Malformed CVE ID format may return a validation error
- Network timeout if the upstream CVE data source is slow
- Query string too vague may return no matches or irrelevant results

## How this service works

Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.

## Output

Returns a JSON object with the CVE identifier, severity label (e.g. CRITICAL, HIGH, MEDIUM, LOW), and CVSS v3 numeric score for the requested vulnerability.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "q": {
       "type": "string"
      },
      "cve": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "cve": "CVE-2021-44228",
  "severity": "CRITICAL",
  "cvss_v3_score": 10
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cve-lookup-34ff042d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from anibalb.duckdns.org](https://www.zero.xyz/host/anibalb.duckdns.org/llms.txt)