# Domain Intel — MX/Mail Policy Intelligence (Combell)

> Domain Intel — MX/Mail Policy Intelligence (Combell) 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).

Looks up and returns WHOIS, DNS, MX mail policy, TLS certificate, and subdomain data for a given domain, with optional baseline comparison for mail records.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/mx-combell?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-mail-policy-intelligence-combell-add3ae74
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lsSdxiY2a1v9AKPX0LHRv

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-mail-policy-intelligence-combell-add3ae74 -d '<json body>'
```

Example prompt: Pull the full domain intelligence report for example.com — I want the WHOIS, DNS, MX mail policy, TLS certificate details, and any subdomains you can find.

## When to prefer this

Choose this endpoint when you need a comprehensive, pay-per-call domain intelligence report without API key registration. Ideal for one-off domain audits, automated security investigations, email infrastructure verification, or MX record change detection — especially when you want WHOIS + DNS + TLS + subdomains in a single call billed in USDC via x402.

## Known failure modes

- Invalid or malformed domain name returns validation error
- Domain not found or unresolvable returns empty or error response
- Baseline schema mismatch (missing required fields) causes request rejection
- Rate limiting or payment failure via x402 protocol returns 402 error
- Timeout if upstream DNS/WHOIS services are slow to respond

## 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 bundle for the queried domain including WHOIS registration data, DNS record set, MX mail exchange records with priorities, mail policy details (SPF/DKIM/DMARC), TLS certificate metadata, and discovered subdomains. If a baseline is provided, may indicate changes relative to that baseline.

## 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-mail-policy-intelligence-combell-add3ae74/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)