# Domain Intel – NS Record Lookup via x402

> Domain Intel – NS Record 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).

Retrieves NS (nameserver) record intelligence for a domain, including WHOIS, DNS, mail policy, TLS certificate, and subdomain data, with pay-per-call USDC billing via x402.

## Facts

- Endpoint: POST https://dns.halowerk.com/domain/articles/ns-ns1?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-ns-record-lookup-via-x402-5e6af213
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_m2_XvWnYwuvH7Z8-MPT-l

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-ns-record-lookup-via-x402-5e6af213 -d '<json body>'
```

Example prompt: Pull the full domain intelligence for example.com — nameservers, WHOIS, DNS records, mail policy, TLS cert, and subdomains — and flag any changes compared to last week's baseline records ['ns1.oldhost.com','ns2.oldhost.com'] observed on 2025-01-10.

## When to prefer this

Choose this endpoint when you need comprehensive, on-demand domain intelligence (NS, WHOIS, DNS, mail policy, TLS, subdomains) without API key signup, paying only per call in USDC via x402. It is ideal for agents that need sporadic or ad-hoc domain lookups, security recon workflows, or baseline comparison without committing to a subscription-based DNS intelligence service.

## Known failure modes

- Invalid or malformed domain name returns a validation error
- Non-existent domain (NXDOMAIN) returns empty or error response
- Payment failure via x402 results in 402 response and no data returned
- Baseline schema mismatch (missing required fields) returns 400 bad request
- Rate limits or upstream DNS resolver timeouts may cause partial or delayed 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 comprehensive domain intelligence including NS records, full DNS record set, WHOIS registration data, mail policy records (SPF, DKIM, DMARC), TLS/SSL certificate details, and discovered subdomains for the queried domain. When a baseline is provided, results may highlight deviations from previously observed records.

## 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-ns-record-lookup-via-x402-5e6af213/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)