# Domain Intel — MX Record Intelligence (Netcup Article)

> Domain Intel — MX Record Intelligence (Netcup Article) is a paid API for AI agents from dns.halowerk.com, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-13).

Retrieves WHOIS, DNS, mail policy (MX), TLS certificate, and subdomain intelligence for a given domain, paying per call in USDC via x402

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/mx-netcup?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-intel-mx-record-intelligence-netcup-article-b7c041e9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Uy-gjhAW-LppikuZ4b5bs

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 domain-intel-mx-record-intelligence-netcup-article-b7c041e9 -d '<json body>'
```

Example prompt: Pull up the full domain intelligence report for halowerk.com — I want WHOIS, DNS, MX records, TLS certificate details, and any subdomains you can find, and compare the MX records against this baseline: exchange=mail.netcup.de priority=10, observed two days ago.

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-signal domain intelligence report in a single pay-per-call request without API key registration. It is especially useful for one-off domain audits, comparing current MX records against a known baseline, or when you want WHOIS + DNS + TLS + subdomains bundled together rather than querying separate specialized APIs. It suits agents operating in a trustless, no-signup context using USDC micropayments via x402.

## Known failure modes

- Invalid or malformed domain name returns a validation error
- Domain not found or unregistered returns empty or null WHOIS/DNS data
- Baseline MX records schema mismatch (missing required fields) causes a 400 bad request
- Payment failure via x402 protocol results in a 402 Payment Required response, blocking the lookup
- Rate limiting or upstream DNS resolver timeout may return a 503 or partial data response

## How this service works

Domain in, WHOIS, DNS, mail policy, TLS certificate and subdomains out. Pay per call in USDC over x402. No signup, no API key.

## Output

Returns a structured intelligence report for the queried domain including WHOIS registration data, DNS record set, MX mail exchange records with priorities, mail policy (e.g. SPF/DMARC), TLS certificate metadata, and discovered subdomains. When a baseline is provided, the response may include change detection against the supplied MX snapshot.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "maxLength": 253
  },
  "baseline": {
   "type": "object",
   "required": [
    "domain",
    "observed_at",
    "records"
   ],
   "properties": {
    "domain": {
     "type": "string",
     "maxLength": 253
    },
    "records": {
     "type": "array",
     "items": {
      "type": "object",
      "required": [
       "exchange",
       "priority"
      ],
      "properties": {
       "exchange": {
        "type": "string",
        "maxLength": 254
       },
       "priority": {
        "type": "integer",
        "maximum": 65535,
        "minimum": 0
       }
      },
      "additionalProperties": false
     },
     "maxItems": 50
    },
    "observed_at": {
     "type": "string",
     "maxLength": 40
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-intel-mx-record-intelligence-netcup-article-b7c041e9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.halowerk.com](https://www.zero.xyz/host/dns.halowerk.com/llms.txt)