# dns-cname-checkout-subdomain

> dns-cname-checkout-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 checkout subdomain of a given domain using Cloudflare DNS over HTTPS, returning existence status, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/checkout/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-checkout-subdomain-42bec943
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kvHWue_LPRFVR8DbYDq-c

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-checkout-subdomain-42bec943
```

Example prompt: Can you check if checkout.shopify.com has a CNAME record set up — I want to know if it exists, what it points to, and its TTL?

## When to prefer this

Use this endpoint when you specifically need to verify or discover the CNAME configuration of the checkout subdomain for a given domain, without enumerating all subdomains. Ideal for e-commerce infrastructure checks, pre-launch DNS validation, or auditing payment/checkout flows. Prefer over generic DNS tools when you want a targeted, single-host CNAME check via Cloudflare DoH with pay-per-use pricing.

## Known failure modes

- Domain does not have a checkout subdomain — returns NXDOMAIN with no records
- Invalid or malformed domain name input — may return an error or empty response
- Cloudflare DoH upstream timeout or unavailability — lookup fails
- Domain exists but checkout subdomain has no CNAME record (may have A/AAAA instead) — returns empty CNAME set

## How this service works

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

## Output

Returns whether the checkout.<domain> CNAME record exists, the actual CNAME record value(s), the TTL, and the DNS response code (e.g. NOERROR or NXDOMAIN), as resolved via 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-cname-checkout-subdomain-42bec943/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)