# DNS A Record Lookup for video Subdomain via Cloudflare DoH

> DNS A Record Lookup for video 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 A record(s) for the video.<domain> subdomain using Cloudflare DNS over HTTPS and returns existence status, IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/video/a?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-a-record-lookup-for-video-subdomain-via-cloudflare-doh-f95143da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wkFAfRngMANYO8DYyPLfG

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-video-subdomain-via-cloudflare-doh-f95143da
```

Example prompt: Can you check whether the video subdomain exists for example.com and tell me what IP addresses it resolves to?

## When to prefer this

Use this endpoint when you need a quick, targeted existence check for the video subdomain of a specific domain without doing full subdomain enumeration. It is ideal when you already know the host pattern you care about (video.*) and want a lightweight, paid-per-call DNS lookup via Cloudflare's reliable DoH infrastructure rather than running your own DNS queries.

## Known failure modes

- Domain does not exist — NXDOMAIN response with no records returned
- video subdomain not configured — empty answer section with NOERROR
- Invalid or malformed domain input — may return an error or empty result
- Cloudflare DoH temporarily unavailable — request timeout or upstream error
- Rate limiting or payment failure — 402 or 429 response

## How this service works

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

## Output

Returns the A record lookup result for video.<domain>, including whether the subdomain exists, its IP address records, TTL value, and the DNS response code from Cloudflare's DoH 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-video-subdomain-via-cloudflare-doh-f95143da/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)