# DNS A Record Lookup for mobile.<domain> via Cloudflare DoH

> DNS A Record Lookup for mobile.<domain> 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 2026-10-21).

Looks up the A record(s) for the mobile subdomain of a given domain using Cloudflare DNS-over-HTTPS, returning existence status, IP addresses, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/mobile/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-mobile-domain-via-cloudflare-doh-b0aff8a2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__sSuiOhnNlNWI_m8onoPV

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-mobile-domain-via-cloudflare-doh-b0aff8a2
```

Example prompt: Can you check whether mobile.shopify.com exists in DNS and what IP address it resolves to?

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.01) existence check specifically for the 'mobile' subdomain of a domain, without needing to enumerate all subdomains. Prefer it over generic DNS tools when you only care about the mobile host and want Cloudflare's authoritative DoH resolution.

## Known failure modes

- Domain does not exist (NXDOMAIN) — returns no records and non-existence status
- mobile subdomain not configured — returns empty record set
- Network timeout reaching Cloudflare DoH — service error
- Invalid domain input format — malformed request error
- Cloudflare DoH returns SERVFAIL for the queried name

## How this service works

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

## Output

Returns whether mobile.<domain> exists in DNS, its A record IP address(es), and the TTL of those records, sourced from Cloudflare DNS-over-HTTPS. If the host does not exist, the response indicates a non-existence result (e.g. NXDOMAIN).

## 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-mobile-domain-via-cloudflare-doh-b0aff8a2/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)