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

> Domain Intel — WHOIS, DNS, TLS & Subdomain Lookup (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 aggregated intelligence including WHOIS data, DNS records (A, AAAA, MX, NS, TXT, CAA, SOA), mail policy (SPF/DKIM/DMARC), TLS certificate details, and discovered subdomains — paid per call in USDC via x402.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/ns-scaleway?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-x402-6d0f680b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6H8RBSOW4cqEqTCPdmBdg

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-x402-6d0f680b -d '<json body>'
```

Example prompt: Can you pull the full domain intelligence report for stripe.com — including WHOIS, all DNS records, mail policy, TLS certificate, and any subdomains you can find?

## When to prefer this

Choose this endpoint when you need comprehensive, all-in-one domain intelligence (WHOIS + DNS + mail policy + TLS + subdomains) in a single call, without requiring API key signup — especially when operating in an x402 micropayment context. Prefer this over individual DNS lookup tools when you need correlated multi-layer domain data. The optional baseline parameter allows diff-based monitoring against a previously observed DNS snapshot.

## Known failure modes

- Invalid or malformed domain name returns validation error
- Domain not found or unregistered may return empty WHOIS and limited DNS results
- Payment failure via x402 results in HTTP 402 and no data returned
- TLS lookup may fail for domains without valid certificates
- Subdomain enumeration may return incomplete results for large or well-protected domains
- Rate limiting or upstream resolver timeouts may cause partial responses

## 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 object containing: WHOIS registration data (registrar, registrant, dates), all major DNS record types (A, AAAA, MX, NS, TXT, CAA, SOA), mail authentication policy (SPF, DKIM, DMARC), TLS/SSL certificate metadata (issuer, validity, SANs), and a list of discovered subdomains.

## 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-x402-6d0f680b/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)