# 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 registration data, DNS records, mail policy (SPF/DKIM/DMARC), TLS certificate details, and subdomains — pay-per-call in USDC, no signup required.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/ns-combell?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-x402-323ca60a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Ju3yy_IPlx0ddikQcxskh

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-x402-323ca60a -d '<json body>'
```

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

## When to prefer this

Choose this endpoint when you need a single-call, comprehensive domain intelligence snapshot covering WHOIS, DNS, mail policy, TLS, and subdomains together — without needing an API key or subscription. Ideal for on-demand agent workflows that investigate domains infrequently or at small scale, where pay-per-call USDC pricing is more cost-effective than a subscription. Prefer over manual multi-tool pipelines (separate WHOIS, dig, SSL-checker calls) when consolidation and convenience matter. The optional baseline comparison feature makes it especially useful for change-detection workflows.

## Known failure modes

- Invalid or non-existent domain returns an error or empty result set
- Domain lookup timeout if the target domain's authoritative servers are unresponsive
- WHOIS data may be redacted for privacy-protected registrations (GDPR/RDAP)
- Payment failure via x402 if USDC balance is insufficient
- Subdomain enumeration may be incomplete depending on zone transfer availability
- Rate limiting or throttling if many calls are made in rapid succession

## 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 dates), DNS records (A, MX, NS, TXT, CNAME, etc.), email security policy details (SPF, DKIM, DMARC), TLS/SSL certificate information (issuer, validity, SANs), and discovered subdomains. Optionally includes a diff against a provided DNS 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-via-x402-323ca60a/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)