# Domain Intel — MX Record Check for IONOS (dns.halowerk.com)

> Domain Intel — MX Record Check for IONOS (dns.halowerk.com) is a paid API for AI agents from dns.halowerk.com, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-12).

Returns WHOIS, DNS, mail policy (MX), TLS certificate, and subdomain data for a given domain, with optional MX baseline comparison, paid per call via x402/USDC.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/mx-ionos?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-intel-mx-record-check-for-ionos-dns-halowerk-com-13e2e55f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_USN6AQozKDJa3UFPKz_Ls

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-check-for-ionos-dns-halowerk-com-13e2e55f -d '<json body>'
```

Example prompt: Pull the full domain intel for example.com — WHOIS, DNS, MX records, TLS cert, and subdomains — and compare the MX records against this baseline: [{"exchange":"mx.ionos.com","priority":10}] observed on 2024-01-15.

## When to prefer this

Choose this endpoint when you need comprehensive domain intelligence in a single call — WHOIS, DNS, MX, TLS, and subdomains — without signing up for an account or managing API keys. Particularly useful for one-off lookups, automated compliance checks, or when comparing MX records against a known baseline to detect mail routing changes. The x402/USDC pay-per-call model makes it cost-effective for sporadic, agent-driven queries. Prefer alternatives if you need high-volume batch lookups or require SLA guarantees.

## Known failure modes

- Domain not found or unresolvable — returns empty or error response
- Invalid domain format exceeding 253 characters — schema validation failure
- Payment not received or x402 handshake fails — 402 response, no data returned
- Baseline object malformed (missing required fields) — request rejected
- Rate limiting or upstream DNS resolver timeout — partial or no data returned

## 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

A structured report containing WHOIS registration data, DNS record set, MX (mail exchanger) records with priorities, inferred mail policy (SPF/DKIM/DMARC signals), TLS certificate metadata, and discovered subdomains for the queried domain. If a baseline is provided, the response includes a comparison indicating changes to MX records since the observed_at timestamp.

## 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-check-for-ionos-dns-halowerk-com-13e2e55f/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)