# CVE Lookup via x402 Micropayment

> CVE Lookup via x402 Micropayment is a paid API for AI agents from x402helper.xyz, paid per call via x402, $0.013/call, status unknown (last checked 2026-11-07).

Looks up CVE (Common Vulnerabilities and Exposures) details by CVE identifier, paid per-call via x402 USDC micropayment.

## Facts

- Endpoint: GET https://x402helper.xyz/89e509/cve/lookup?utm_source=zero.xyz
- Price: $0.013/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-07
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cve-lookup-via-x402-micropayment-a60b0022
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_txlrlsnaAeJRAgojtsZaT

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-via-x402-micropayment-a60b0022
```

Example prompt: Can you look up the details for CVE-2021-44228 — I want to know what it affects and how severe it is?

## When to prefer this

Use this endpoint when an AI agent needs on-demand, per-query CVE lookups paid via USDC micropayment (x402), and does not have access to a free CVE data source. Suitable for automated security workflows where pay-per-use pricing is acceptable and no subscription or API key is needed.

## Known failure modes

- Invalid or malformed CVE ID returns an error or empty result
- CVE ID not found in the database returns a failure or null result
- Missing required cve_id query parameter causes a 400-level error
- Payment failure via x402 prevents access to the endpoint
- Rate limiting or quota exhaustion may block repeated calls

## How this service works

X402 micropayments server — AI agents pay USDC for OFAC screening, rates, and billing verification.

## Output

Returns a JSON object with CVE details such as description, severity, affected software, CVSS scores, and related metadata for the specified CVE identifier.

## 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": [
      "cve_id"
     ],
     "properties": {
      "cve_id": {
       "type": "string",
       "default": null,
       "description": "CVE identifier, e.g. CVE-2021-44228"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {},
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cve-lookup-via-x402-micropayment-a60b0022/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402helper.xyz](https://www.zero.xyz/host/x402helper.xyz/llms.txt)