# Domain Intel MX/Mailgun Article Lookup — Halowerk

> Domain Intel MX/Mailgun Article Lookup — Halowerk 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).

Given a domain and optional MX baseline, returns mail exchange records and Mailgun-specific mail policy intelligence for that domain.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/mx-mailgun?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-mailgun-article-lookup-halowerk-66cf9bd9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Lzppy-YIYHfXtvmjyw4Yc

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-mailgun-article-lookup-halowerk-66cf9bd9 -d '<json body>'
```

Example prompt: Check if acme.com uses Mailgun for email — look up its MX records and tell me about its mail policy configuration.

## When to prefer this

Use this endpoint when you specifically need MX record data and Mailgun mail policy intelligence for a domain, especially when you want to detect Mailgun usage or compare current MX records against a known baseline. Prefer this over generic WHOIS or full domain-intel endpoints when your focus is narrowly on mail exchange configuration rather than TLS certificates, subdomains, or WHOIS registrant data. Ideal for pay-per-call usage with no API key or account required.

## Known failure modes

- Domain does not exist or is unresolvable — returns empty or error response
- Domain has no MX records configured — returns empty MX list
- Malformed domain input exceeding 253 characters — schema validation error
- Baseline records array exceeds 50-item limit — rejected with validation error
- Payment failure over x402 protocol — request not processed
- Transient DNS resolution timeout — may return partial or no data

## 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 the current MX records (exchange hostnames and priorities) for the queried domain along with Mailgun-specific mail policy details. If a baseline is supplied, the response may indicate drift or changes relative to that 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-mailgun-article-lookup-halowerk-66cf9bd9/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)