# DNS AAAA Record Lookup for mx2 Subdomain via Cloudflare DoH

> DNS AAAA Record Lookup for mx2 Subdomain via Cloudflare DoH is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-19).

Looks up the AAAA (IPv6) record for the mx2 subdomain of a given domain using Cloudflare DNS over HTTPS, returning existence status, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/mx2/aaaa?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-aaaa-record-lookup-for-mx2-subdomain-via-cloudflare-doh-fed5cd55
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wUMIoFv887iHNAZFU5Us4

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-mx2-subdomain-via-cloudflare-doh-fed5cd55
```

Example prompt: Can you check if mx2.rallylive.ca has an IPv6 AAAA DNS record, and tell me its address and TTL if it exists?

## When to prefer this

Choose this endpoint when you need a quick, targeted IPv6 DNS existence check specifically for the mx2 subdomain without enumerating all subdomains. Prefer it over general DNS tools when you want a pay-per-lookup microservice approach at $0.01/call, or when you specifically need Cloudflare DoH resolution for mx2 AAAA records as part of email infrastructure auditing or network reconnaissance workflows.

## Known failure modes

- Domain does not exist — returns NXDOMAIN or no record found
- mx2 subdomain has no AAAA record (only A record exists) — returns empty or NOERROR with no data
- Invalid domain format provided — may return error or empty result
- Cloudflare DoH upstream unavailable — returns service error
- Network timeout reaching Cloudflare DoH — returns timeout error

## How this service works

AAAA record of mx2.<domain>: looks up the mx2 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 mx2 without enumerating subdomains. $0.01 per lookup.

## Output

Returns whether the mx2 subdomain AAAA record exists for the given domain, the IPv6 address(es) in the record, the TTL value, and the DNS response code as resolved 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-record-lookup-for-mx2-subdomain-via-cloudflare-doh-fed5cd55/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)