# 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).

Given a domain name, returns WHOIS, DNS records, mail policy (SPF/DKIM/DMARC), TLS certificate details, and subdomains — paid per call in USDC via x402, no signup required.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/ns-cloudns?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-eab087a6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KreCfw6pNQwOZcGWqVgRx

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-eab087a6 -d '<json body>'
```

Example prompt: Pull a full domain intelligence report on example.com — I need the WHOIS info, all DNS records, SPF/DMARC mail policy, TLS certificate details, and any subdomains you can find.

## When to prefer this

Choose this endpoint when you need a single-call aggregation of domain intelligence across WHOIS, DNS, mail policy, TLS, and subdomains without signing up for an account or managing API keys. Ideal for agents that need pay-per-use pricing in USDC via x402, especially for ad hoc or infrequent domain lookups where subscription-based services like SecurityTrails or WhoisXML API are overkill. Best when you want a combined multi-signal view rather than hitting separate WHOIS, DNS, and certificate APIs individually.

## Known failure modes

- Domain not found or unresolvable — likely returns empty or error payload
- Invalid domain format exceeding 253 characters — schema validation rejection
- Payment failure via x402 — call not processed if USDC payment not confirmed
- Rate limiting or upstream WHOIS/DNS resolver unavailability — transient errors
- Private/redacted WHOIS data — registration info may be minimal due to GDPR redaction
- Baseline mismatch if observed_at or records are malformed

## 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 intelligence object including WHOIS registration data, full DNS record set, mail policy records (SPF, DKIM, DMARC), TLS/SSL certificate details including issuer and expiry, and a list of discovered subdomains. When a baseline is provided, may also surface detected 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": "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-eab087a6/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)