# DNS A Record Lookup for help Subdomain

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

Resolves the A record of help.<domain> via Cloudflare DNS over HTTPS, reporting existence, IP records, and TTL

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/help/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-help-subdomain-9584262c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FfSQJlHYXx7p0gTFd6vMg

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-help-subdomain-9584262c
```

Example prompt: Can you check if help.acmecorp.com exists in DNS — specifically look up the A record for the help subdomain of acmecorp.com and tell me its IP and TTL?

## When to prefer this

Choose this endpoint when you need a quick, targeted existence and IP check for the help subdomain of a specific domain without performing broad subdomain enumeration. Ideal for SaaS infrastructure auditing, competitor research, or pre-launch DNS verification where only the help host is of interest. Prefer this over generic DNS tools when you want a single-purpose, low-cost ($0.01) API call with Cloudflare DoH reliability.

## Known failure modes

- Domain does not exist — NXDOMAIN response with no records returned
- help subdomain not configured — empty record set indicating the host is absent
- Invalid or malformed domain input — API may return an error or empty result
- DNS lookup timeout — Cloudflare DoH unreachable or slow
- Payment failure — x402 payment of $0.01 USDC not completed, request rejected

## How this service works

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

## Output

Returns whether the help.<domain> A record exists, the resolved IP address(es), and the TTL value as reported by Cloudflare DoH. If the subdomain does not exist, indicates non-existence without enumerating other subdomains.

## 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-help-subdomain-9584262c/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)