# dns-aaaa-db-subdomain

> dns-aaaa-db-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 2026-10-22).

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

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/db/aaaa?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-aaaa-db-subdomain-1b6a8e38
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uRF0QRMEQgbCfjs5B2LBp

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-db-subdomain-1b6a8e38
```

Example prompt: Can you check whether db.example.com has an IPv6 AAAA DNS record — I want to know if it exists, what the address is, and what the TTL is?

## When to prefer this

Use this endpoint when you need a targeted, fast IPv6 DNS check specifically for the 'db' subdomain of a domain, without enumerating all subdomains. Ideal for infrastructure audits, pre-deployment validation, or vendor due diligence when you know you care specifically about the database host's IPv6 presence.

## Known failure modes

- Domain does not exist — returns no records found
- db subdomain has no AAAA record (only A record) — returns empty result
- Invalid or malformed domain input — may return error or empty response
- Cloudflare DoH upstream timeout — service may return an error
- Rate limiting or payment failure — request rejected with 402

## How this service works

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

## Output

Returns whether the AAAA record for db.<domain> exists, the IPv6 address(es) in the record, and the TTL value — all retrieved 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-db-subdomain-1b6a8e38/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)