# DNS A Record Lookup for id Subdomain via Cloudflare DoH

> DNS A Record Lookup for id 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 2026-10-20).

Looks up the A record of the id.<domain> host using Cloudflare DNS over HTTPS and reports existence, IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/id/a?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-a-record-lookup-for-id-subdomain-via-cloudflare-doh-160221ce
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l5dsEpX5ZaMhXrf1jlLLA

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-id-subdomain-via-cloudflare-doh-160221ce
```

Example prompt: Can you check whether id.example.com has a DNS A record — does it resolve to any IP, and what's the TTL?

## When to prefer this

Use this endpoint when you need a quick, targeted existence check for the id host specifically under a given domain, without enumerating all subdomains. It's ideal for identity/SSO portal discovery, pre-deployment validation, or domain intelligence workflows where you want Cloudflare's reliable DoH infrastructure for A record resolution.

## Known failure modes

- Domain does not exist or id subdomain has no A record — returns NXDOMAIN response
- Invalid or malformed domain name input — may return an error or empty result
- Cloudflare DoH service unavailability — request may time out
- Missing required input parameter — API returns a 4xx error
- Rate limiting or payment failure — request rejected with 402

## How this service works

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

## Output

Returns whether the id.<domain> A record exists, any resolved IPv4 addresses, the TTL of the record, and the DNS response code (e.g. NOERROR or NXDOMAIN) as answered by 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-id-subdomain-via-cloudflare-doh-160221ce/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)