# dns-cname-help-subdomain

> dns-cname-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).

Looks up the CNAME record of help.<domain> via Cloudflare DoH and reports its existence, records, and TTL

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/help/cname?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-cname-help-subdomain-8916f92b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_euOVg5oEZM3qBdvlIsRAc

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-cname-help-subdomain-8916f92b
```

Example prompt: Check if help.acmecorp.com exists and what its CNAME record points to — I want to know the target host and TTL.

## When to prefer this

Use this endpoint when you need a quick, targeted check for the CNAME record of specifically the 'help' subdomain of a given domain, without enumerating all subdomains. Ideal for validating help desk or documentation platform routing (e.g. Help Scout, Zendesk) and for infrastructure audits where you want to confirm a specific well-known host is properly configured.

## Known failure modes

- Domain does not have a help subdomain CNAME (record not found, existence=false)
- Invalid or malformed domain name input
- Cloudflare DoH upstream timeout or resolution failure
- Domain does not exist at all (NXDOMAIN)
- Payment not included or insufficient (x402 payment required)

## How this service works

CNAME record of help.<domain>: looks up the help host under the domain you give (CNAME 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> CNAME record exists, the full DNS record data including the canonical target host, and the TTL value for the record.

## 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-cname-help-subdomain-8916f92b/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)