# Domain Intel — WHOIS, DNS, TLS & Subdomain Lookup via x402

> Domain Intel — WHOIS, DNS, TLS & Subdomain Lookup via x402 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).

Returns WHOIS, DNS records, mail policy, TLS certificate details, and subdomains for a given domain, paid per-call in USDC over x402.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/ns-webflow?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-whois-dns-tls-subdomain-lookup-via-x402-985f8013
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-ulWeXjXb75LLiocJt_rx

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-whois-dns-tls-subdomain-lookup-via-x402-985f8013 -d '<json body>'
```

Example prompt: Pull a full domain intelligence report for stripe.com — I want WHOIS, DNS records, mail policy (SPF/DKIM/DMARC), TLS certificate details, and any subdomains you can find.

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-signal domain intelligence snapshot (WHOIS + DNS + mail policy + TLS + subdomains) in a single call without requiring an API key or subscription. It is ideal for ad-hoc security research, phishing investigation, vendor due diligence, or DNS change detection via baseline diffing. Prefer it over standalone WHOIS or DNS-only APIs when breadth of signal matters and you want pay-as-you-go USDC billing with no account setup.

## Known failure modes

- Domain not found or unresolvable — returns empty or error response
- Invalid domain format (exceeds 253 chars or malformed) — schema validation rejection
- WHOIS data unavailable for some ccTLDs or privacy-shielded registrations
- TLS certificate absent if domain has no HTTPS endpoint
- Subdomains may be incomplete if the domain uses aggressive wildcard DNS
- Payment failure over x402 if wallet has insufficient USDC balance
- Rate or timeout issues for very large subdomain sets

## 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 covering: WHOIS registration data (registrar, registrant, dates), DNS records (A, AAAA, MX, NS, TXT, CNAME, etc.), mail authentication policy (SPF, DKIM, DMARC), TLS certificate details (issuer, validity, SANs), and discovered subdomains — all for the queried domain. When a baseline is supplied, the response can highlight changes versus the prior 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": "string",
      "maxLength": 254
     },
     "maxItems": 50
    },
    "observed_at": {
     "type": "string",
     "maxLength": 40
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/domain-intel-whois-dns-tls-subdomain-lookup-via-x402-985f8013/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)