# AgentsToolsHub CVE Lookup

> AgentsToolsHub CVE Lookup is a paid API for AI agents from agentstoolshub.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).

Look up a CVE identifier in the US National Vulnerability Database to retrieve its CVSS 3.1 score, severity vector, CWE classification, human-readable summary, and references.

## Facts

- Endpoint: GET https://agentstoolshub.com/api/v1/security/cve-lookup?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentstoolshub-cve-lookup-8f201418
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FosTp_xGKW3c2atAgiPL1

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 agentstoolshub-cve-lookup-8f201418
```

Example prompt: Can you look up CVE-2021-44228 and tell me its CVSS 3.1 score, severity rating, and what weakness category it falls under?

## When to prefer this

Choose this endpoint when you need authoritative CVSS 3.1 scoring, severity vectors, CWE classifications, and NVD-sourced summaries for a specific CVE identifier. Prefer it over general web search when you need structured, machine-readable vulnerability metadata that can be used programmatically in risk scoring, compliance reporting, or security triage workflows. Ideal when the agent needs a definitive, NVD-backed answer rather than community or vendor-specific assessments.

## Known failure modes

- CVE ID not found in NVD — returns an error or empty result for CVEs not yet published or incorrectly formatted IDs
- Malformed CVE ID format (e.g. missing 'CVE-' prefix or invalid year/sequence) — may return validation error
- NVD upstream unavailability — may return timeout or service error
- Very recent CVEs may not yet have full CVSS scores assigned in NVD — partial data returned
- Rate limiting or payment failure may result in 402 or 429 responses

## How this service works

Look up any CVE in the US National Vulnerability Database (NVD): CVSS 3.1 score and severity vector, weakness (CWE) classification, human summary and references. The authoritative answer when an agent needs to know how bad a vulnerability actually is. Use this when an agent needs to cVSS score, severity and references from NVD.

## Output

Returns the CVE's CVSS 3.1 base score and severity vector string (e.g. AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H), CWE weakness classification, a human-readable description of the vulnerability, and a list of authoritative references and advisories sourced directly from the NVD.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "cveId"
     ],
     "properties": {
      "cveId": {
       "type": "string",
       "description": "CVE ID"
      }
     }
    }
   },
   "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/agentstoolshub-cve-lookup-8f201418/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentstoolshub.com](https://www.zero.xyz/host/agentstoolshub.com/llms.txt)