# 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 WHOIS registration data, DNS records (A, AAAA, MX, NS, TXT, CAA, SOA), mail policy (SPF/DMARC), TLS certificate details, and discovered subdomains — paid per call in USDC via x402.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/ns-microsoft-azure-dns?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-b527aaac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hGhZPMyFYMw7E5zKzIcp4

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-b527aaac -d '<json body>'
```

Example prompt: Pull a full domain intelligence report for stripe.com — I want WHOIS registration details, all DNS records, SPF and DMARC mail policy, TLS certificate info, and any discovered subdomains.

## When to prefer this

Choose this endpoint when you need a comprehensive, aggregated view of a domain's full technical footprint — combining WHOIS, DNS, mail policy, TLS, and subdomain enumeration in a single pay-per-call request with no API key or signup required. Prefer it over single-purpose DNS resolvers or WHOIS-only tools when you need multi-signal domain intelligence in one shot, especially in agent workflows where credential management is a burden.

## Known failure modes

- Domain not found or unresolvable — WHOIS or DNS lookup returns empty
- Invalid domain format (exceeds 253 characters or malformed) — input validation error
- WHOIS rate limiting or registry unavailability — partial data returned
- TLS certificate absent or unreachable — certificate field may be null
- Payment failure via x402 — call rejected before execution
- Baseline records array exceeds 50-item limit — schema validation error

## 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 report including: WHOIS registration data (registrar, registrant, expiry), all major DNS record types (A, AAAA, MX, NS, TXT, CAA, SOA), mail security policy records (SPF, 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-b527aaac/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)