# 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 against security intelligence sources to assess its reputation and detect threats

## Facts

- Endpoint: GET https://shield.vainplex.dev/api/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/shieldapi-domain-reputation-check-b4ccfac4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EkWfOVDz-fpoa9FwDALdu

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 shieldapi-domain-reputation-check-b4ccfac4
```

Example prompt: Can you run a ShieldAPI reputation check on the domain payment-gateway-secure.xyz before I trust it with my credentials — I want to know if it's flagged as malicious or phishing?

## When to prefer this

Use this endpoint when you need a quick reputation check on a specific domain before trusting it in an automated workflow, payment flow, or agent action — especially in x402 payment contexts where verifying merchant or callback domains is critical

## Known failure modes

- Invalid or malformed domain name returns validation error
- Domain not found in intelligence database returns unknown/no-data result
- Network timeout or service unavailability returns 5xx error
- Rate limiting or payment failure returns 402 or 429 error

## How this service works

Domain reputation & security check

## Output

Returns a domain reputation assessment including threat classification, blacklist status, and security intelligence signals indicating whether the domain is safe, suspicious, or malicious

## Example request

```json
{
 "demo": true,
 "domain": "example.com"
}
```

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "required": [
    "method"
   ],
   "properties": {
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/shieldapi-domain-reputation-check-b4ccfac4/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)