# dns-cname-auth-subdomain

> dns-cname-auth-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 for the auth.<domain> subdomain via Cloudflare DNS over HTTPS and reports whether it exists, its records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/auth/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-auth-subdomain-dbca8d64
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_urRfYqT7hJzW11aCb6wUW

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-auth-subdomain-dbca8d64
```

Example prompt: Can you check if auth.rallylive.ca has a CNAME record configured — I want to know if the auth subdomain exists and where it points?

## When to prefer this

Use this endpoint when you need a quick, targeted existence check for the auth.<domain> subdomain specifically via CNAME record type, without performing broad subdomain enumeration. Prefer this over general CNAME resolvers when you want Cloudflare DoH resolution with TTL data included and are focused on the common 'auth' host pattern for a given domain.

## Known failure modes

- Domain does not exist — NXDOMAIN response with no records
- auth subdomain has no CNAME record (may have A/AAAA instead) — empty records returned
- Invalid or malformed domain input — error or unexpected response
- Cloudflare DoH unreachable — service timeout or error
- Domain exists but auth subdomain is not configured — NOERROR with empty answer

## How this service works

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

## Output

Returns whether the auth.<domain> CNAME record exists, the record value(s) it contains, the TTL, and the DNS response code — all as resolved by Cloudflare's DNS over HTTPS service.

## 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-auth-subdomain-dbca8d64/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)