# dns-a-checkout-subdomain

> dns-a-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 A record of checkout.<domain> via Cloudflare DNS over HTTPS and reports existence, IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/checkout/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-checkout-subdomain-1b9ed98f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_c4zMN0rZUrmKujU6dJCzM

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-checkout-subdomain-1b9ed98f
```

Example prompt: Can you check if the checkout subdomain of shopify.com exists in DNS and what IP address it resolves to?

## When to prefer this

Use this endpoint when you need a fast, cheap existence-and-resolution check specifically for the checkout subdomain of a domain, without enumerating all subdomains. Prefer it over generic DNS tools when you already know you want the checkout host and want a pre-scoped, single-query answer via Cloudflare DoH.

## Known failure modes

- Domain does not have a checkout subdomain (NXDOMAIN response)
- Invalid or malformed domain input
- Cloudflare DoH upstream timeout or unavailability
- Payment failure for the $0.01 USDC per lookup fee

## How this service works

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

## Output

Returns whether checkout.<domain> has an A record in DNS, the resolved IP address(es), the TTL, and the DNS response code indicating existence or NXDOMAIN/NOERROR status.

## 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-checkout-subdomain-1b9ed98f/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)