# 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 2026-10-12).

Given a domain name, returns comprehensive intelligence including WHOIS data, DNS records, mail policy (SPF/DKIM/DMARC), TLS certificate details, and subdomains — paid per call in USDC via x402.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/ns-google-domains?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/domain-intel-whois-dns-tls-subdomain-lookup-via-x402-7a911193
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_392U9xRfUUAAyNf_zNjLL

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-x402-7a911193 -d '<json body>'
```

Example prompt: Pull a full domain intelligence report for stripe.com — I need WHOIS, DNS records, mail policy, TLS certificate info, and any subdomains you can find.

## When to prefer this

Choose this endpoint when you need a one-shot, no-signup, pay-per-use comprehensive domain intelligence report combining WHOIS, DNS, mail policy, TLS, and subdomain data in a single call. Ideal for agents that need to avoid API key management overhead, operate on an ad-hoc basis, or require micropayment-native workflows via x402/USDC. Prefer this over separate WHOIS or DNS APIs when breadth of domain data matters more than depth in any single category.

## Known failure modes

- Domain not found or unresolvable — returns empty or error response
- Invalid domain string exceeding 253 characters — schema validation error
- Baseline records malformed or missing required fields — validation rejection
- Rate-limited or network timeout fetching WHOIS/DNS upstream — partial or failed response
- Private or redacted WHOIS data — WHOIS fields may be empty or anonymized
- TLD not supported by WHOIS lookup — certificate and DNS may still return

## 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 containing: WHOIS registration data (registrar, registrant, expiry), full DNS records (A, AAAA, MX, NS, TXT, CNAME, etc.), mail security policy records (SPF, DKIM, DMARC), TLS certificate chain details (issuer, validity, SANs), and discovered subdomains. When a baseline is provided, highlights changes relative to the prior observed state.

## 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-x402-7a911193/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)