# 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, 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-dynadot?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-x402-4065472a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_a8_jpgLHHnYUtOaHN5OQP

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-x402-4065472a -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need a comprehensive, multi-signal domain intelligence snapshot in a single call — combining WHOIS, DNS, mail policy, TLS, and subdomains — without signing up for an account or managing API keys. It is ideal for one-off or infrequent lookups where pay-per-call economics (\$0.009 USDC) are preferable to subscription plans. The optional baseline parameter makes it useful for change-detection workflows comparing current state against a prior snapshot.

## Known failure modes

- Domain not found or invalid — returns error if the domain string is malformed or unresolvable
- WHOIS rate limiting — some registries throttle lookups, potentially returning partial data
- TLS certificate unavailable — if the domain has no HTTPS endpoint, cert data will be absent
- Subdomain enumeration may be incomplete — passive enumeration only, not guaranteed exhaustive
- x402 payment failure — if USDC payment is rejected, the call returns 402 with no data
- Baseline schema mismatch — if baseline object fields are malformed, validation error is returned

## 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 containing: WHOIS registration details (registrar, registrant, expiry dates), full DNS record set (A, AAAA, MX, NS, TXT, CAA, SOA), mail policy configuration (SPF, DKIM, DMARC), TLS/SSL certificate metadata, and a list of discovered subdomains. Optionally diff'd against a provided baseline 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-x402-4065472a/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)