# DNS A Record Lookup for beta Subdomain (Cloudflare DoH)

> DNS A Record Lookup for beta Subdomain (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 2026-10-21).

Looks up the A (IPv4) record for the beta.<domain> subdomain via Cloudflare DNS over HTTPS and returns existence status, IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/beta/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-beta-subdomain-cloudflare-doh-611028e9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ECCbEtdam7Y9tg2vOPVlq

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-beta-subdomain-cloudflare-doh-611028e9
```

Example prompt: Can you check if beta.rallylive.ca has an A record — I want to know if the beta subdomain exists, what IP it points to, and what the TTL is?

## When to prefer this

Choose this endpoint when you need a fast, targeted existence and resolution check for specifically the 'beta' subdomain of a domain, without enumerating all subdomains. Ideal for DevOps pipelines, deployment checks, or auditing whether a beta environment is DNS-live. Prefer over general DNS tools when you want a paid, reliable, single-host check via Cloudflare's authoritative DoH resolver.

## Known failure modes

- NXDOMAIN response if beta subdomain does not exist for the given domain
- Invalid or malformed domain input returns an error
- Domain with no DNS delegation may return SERVFAIL
- Cloudflare DoH service downtime could cause lookup failure
- Rate limiting or payment failure may block the request

## How this service works

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

## Output

Returns whether the beta.<domain> A record exists, the resolved IPv4 address(es), the TTL value, and the DNS response code (e.g. NOERROR or NXDOMAIN), sourced from 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-a-record-lookup-for-beta-subdomain-cloudflare-doh-611028e9/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)