# DNS AAAA Record Lookup for www Subdomain

> DNS AAAA Record Lookup for www Subdomain is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Looks up the IPv6 AAAA DNS record for the www subdomain of a given domain using Cloudflare DNS over HTTPS and reports existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/www/aaaa?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-aaaa-record-lookup-for-www-subdomain-d6285c13
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z6KFyhHM1L11CxzJlDn3E

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 dns-aaaa-record-lookup-for-www-subdomain-d6285c13
```

Example prompt: Can you check if www.example.com has an IPv6 AAAA DNS record and tell me what address it resolves to?

## When to prefer this

Use this endpoint when you specifically need to check the IPv6 (AAAA) DNS record for the www subdomain of a domain, rather than doing a general DNS lookup or enumerating all subdomains. It is ideal for quick, targeted existence checks of the most common web host prefix without broader subdomain enumeration.

## Known failure modes

- Domain does not exist — returns NXDOMAIN response code with no records
- www subdomain has no AAAA record (only A record exists) — returns empty records with NOERROR
- Cloudflare DoH service is unreachable — network-level timeout or error
- Invalid domain format provided — may return an error or unexpected result
- Domain exists but www subdomain is not configured — returns empty or NXDOMAIN

## How this service works

AAAA record of www.<domain>: looks up the www host under the domain you give (AAAA via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like www without enumerating subdomains. $0.01 per lookup.

## Output

Returns whether the AAAA record for www.<domain> exists, the IPv6 address records found, the TTL value, and the DNS response code — allowing quick determination of IPv6 availability for the www host.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dns-aaaa-record-lookup-for-www-subdomain-d6285c13/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)