# DNS A Record Lookup for test Subdomain

> DNS A Record Lookup for test 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 A (IPv4) record for the 'test' subdomain of a given domain via Cloudflare DNS over HTTPS and reports its existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/test/a?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-a-record-lookup-for-test-subdomain-37d9a30b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iYSOoXdPk-KvHLbt9piIT

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-a-record-lookup-for-test-subdomain-37d9a30b
```

Example prompt: Can you check if the 'test' subdomain of rallylive.ca exists and what IP address it resolves to?

## When to prefer this

Use this endpoint when you need a quick, targeted existence check for the 'test' subdomain specifically, without enumerating all subdomains. Ideal for pre-deployment checks, security audits, and vendor onboarding validation. Prefer this over general DNS tools when you specifically need to know if 'test.<domain>' has an IPv4 address via Cloudflare DoH.

## Known failure modes

- Domain does not exist — returns NXDOMAIN response code with no records
- test subdomain not configured — NXDOMAIN with empty record set
- Invalid or malformed domain input — may return error or empty response
- Cloudflare DoH temporarily unavailable — upstream resolver timeout
- Domain exists but has no A record (only AAAA or CNAME) — empty A record response

## How this service works

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

## Output

Returns whether the A record for test.<domain> exists, the resolved IPv4 address(es), the TTL value, and the DNS response code (e.g. NOERROR or NXDOMAIN), as answered by Cloudflare's DNS over HTTPS resolver.

## 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-a-record-lookup-for-test-subdomain-37d9a30b/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)