# ShieldAPI Domain Reputation Check

> ShieldAPI Domain Reputation Check is a paid API for AI agents from shield.vainplex.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Checks a domain name for security reputation, DNS records, SSL status, and blacklist presence to assess risk level for agent security decisions

## Facts

- Endpoint: GET https://shield.vainplex.dev/api/cdp/check-domain
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/shield-vainplex-dev-6f4835b1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OaKQmaDY3iv3J6CBLL0by

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 shield-vainplex-dev-6f4835b1
```

Example prompt: Can you check whether vainplex.dev is a safe, reputable domain — I want to know its risk score, whether it's on any blacklists, and if its DNS and SSL look legitimate?

## When to prefer this

Use this endpoint when an AI agent needs to assess whether a domain is safe before interacting with it, following links, sending emails, or making API calls — especially useful for pre-flight security checks in agentic workflows. Prefer this over IP reputation checks when you have a hostname rather than a raw IP, and over URL safety checks when you want DNS-level and blacklist intelligence rather than page content analysis.

## Known failure modes

- Invalid or malformed domain name returns an error
- Domain with no DNS records may return empty DNS fields
- Blacklist resolver errors are noted in the response but don't block results
- Network timeout if DNS resolution takes too long
- Non-existent TLD or private/internal domains may return incomplete data

## How this service works

ShieldAPI - x402 security preflight before agents trust a domain, merchant, issuer, or callback host

## Output

Returns a structured object with the domain's DNS records (A, MX, NS, TXT), SPF and DMARC presence, SSL validity and HTTP status, results from multiple spam/malware blacklists (Spamhaus, SpamCop, SORBS), a numeric risk score, and a categorical risk level (e.g. 'low', 'medium', 'high').

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "domain": "google.com"
  }
 }
}
```

## 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": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "description": "Domain name to check for reputation and agent security risks (e.g. vainplex.dev)"
      }
     }
    }
   },
   "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/shield-vainplex-dev-6f4835b1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from shield.vainplex.dev](https://www.zero.xyz/host/shield.vainplex.dev/llms.txt)