# dns-a-img-subdomain

> dns-a-img-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 record of the img.<domain> subdomain via Cloudflare DNS over HTTPS and reports its existence, IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/img/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-img-subdomain-a3383486
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b5mBY3O12aCX2ji65oVCA

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-img-subdomain-a3383486
```

Example prompt: Can you check whether the img subdomain exists for example.com and tell me its IP address and TTL?

## When to prefer this

Use this endpoint when you need a quick, targeted existence check for the img subdomain of a specific domain without doing broad subdomain enumeration. It is ideal for infrastructure audits, pre-launch DNS validation, or automated monitoring of whether a domain has an image-serving host configured. Prefer this over general A-record endpoints when you specifically want the img host, and over full subdomain scanners when you only need this single common hostname.

## Known failure modes

- Domain does not have an img subdomain — returns NXDOMAIN or empty records
- Malformed domain input — may return an error or no results
- Transient Cloudflare DoH failure — may return a timeout or DNS server error
- Payment not processed — request blocked before DNS lookup occurs

## How this service works

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

## Output

Returns whether the img.<domain> A record exists, the resolved IP address(es), the TTL of the record, and the DNS response code. If the subdomain does not exist, it reports that no records were found.

## 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-img-subdomain-a3383486/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)