# Domain Intel — MX/iCloud Mail Article Lookup

> Domain Intel — MX/iCloud Mail Article Lookup 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).

Accepts a domain and optional MX baseline, then returns WHOIS, DNS records, mail policy (SPF/DKIM/DMARC), TLS certificate, and subdomains, with a focus on iCloud/Apple Mail MX context; paid per call in USDC via x402.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/mx-icloud-mail?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-icloud-mail-article-lookup-4ab1c756
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Whw6CJdLBdwhfRP9rD5Qi

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-icloud-mail-article-lookup-4ab1c756 -d '<json body>'
```

Example prompt: Look up the complete domain intelligence for example.com — I want to see its WHOIS, DNS records, mail policy, TLS certificate, and subdomains, and compare the MX records against this baseline: [{"exchange":"mx1.mail.icloud.com","priority":10}] observed on 2024-01-15.

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-signal domain profile in a single call — combining WHOIS, DNS, mail policy, TLS, and subdomains — without requiring an API key or subscription. It is particularly well-suited for iCloud/Apple Mail MX auditing scenarios and for agents that need to detect MX drift against a known baseline. Prefer it over single-purpose DNS or WHOIS APIs when breadth of signal matters and you want frictionless pay-per-call access via USDC/x402.

## Known failure modes

- Domain not found or unresolvable — returns empty or error response
- Invalid domain format exceeding 253 characters — schema validation error
- WHOIS rate-limiting or registry unavailability — partial results
- Payment not processed via x402 — 402 Payment Required response before data is returned
- Baseline schema mismatch (missing required fields) — request rejected
- TLS certificate unavailable for domain — certificate field absent in 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 comprehensive domain profile including WHOIS registration data, resolved DNS records (A, AAAA, MX, NS, TXT, CAA, SOA), SPF/DKIM/DMARC mail policy, TLS certificate details, enumerated subdomains, and — when a baseline is provided — a diff against the previously observed MX record set.

## 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-icloud-mail-article-lookup-4ab1c756/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)