# dns-aaaa-sip-subdomain

> dns-aaaa-sip-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 2026-10-20).

Looks up the AAAA (IPv6) DNS record for the sip subdomain of a given domain via Cloudflare DoH and reports existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/sip/aaaa?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-aaaa-sip-subdomain-3be04b05
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_onqwXc3R9ZhNaO97u_PFF

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-sip-subdomain-3be04b05
```

Example prompt: Can you check if sip.example.com has an IPv6 DNS record — does it exist, and what's the TTL?

## When to prefer this

Use this endpoint when you specifically need to check the IPv6 (AAAA) DNS record for the sip subdomain of a domain — such as verifying VoIP/SIP server IPv6 reachability, auditing telephony infrastructure DNS, or confirming SIP over IPv6 readiness. Prefer this over generic DNS tools when you want a fast, focused existence check for the sip host without broader subdomain enumeration.

## Known failure modes

- Domain has no sip subdomain (NXDOMAIN returned, record does not exist)
- Domain is invalid or malformed input
- Cloudflare DoH upstream timeout or unreachable
- Domain exists but sip subdomain has no AAAA record (only A records exist)
- Rate limiting or payment failure ($0.01 per lookup)

## How this service works

AAAA record of sip.<domain>: looks up the sip 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 sip without enumerating subdomains. $0.01 per lookup.

## Output

Returns whether the AAAA record for sip.<domain> exists, the resolved IPv6 address records, the TTL value, and the DNS response code (e.g. NOERROR or NXDOMAIN). Answered via Cloudflare DNS over HTTPS.

## 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-sip-subdomain-3be04b05/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)