# dns-aaaa-auth-subdomain

> dns-aaaa-auth-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 auth.<domain> subdomain via Cloudflare DNS-over-HTTPS and reports existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/auth/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-auth-subdomain-743e880b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p2aKFnvJN-YV8TyXPksUK

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-auth-subdomain-743e880b
```

Example prompt: Can you check if auth.stripe.com has an AAAA (IPv6) DNS record and tell me its TTL and value?

## When to prefer this

Use this endpoint when you specifically need to check whether a domain's auth subdomain has an IPv6 (AAAA) DNS record, without needing to enumerate all subdomains. Ideal for quick infrastructure checks, security audits, or verifying IPv6 readiness of authentication endpoints.

## Known failure modes

- Domain not found or NXDOMAIN — auth subdomain does not exist under the given domain
- Network or DoH resolver timeout from Cloudflare
- Invalid or malformed domain input
- SERVFAIL response from upstream DNS
- Payment not processed — x402 payment required before response

## How this service works

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

## Output

Returns whether an AAAA record exists for auth.<domain>, the IPv6 address(es) in the record, the TTL value, and the DNS response code — all sourced from a Cloudflare DoH query.

## 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-auth-subdomain-743e880b/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)