# DNS A Record Lookup for pay.<domain> Subdomain

> DNS A Record Lookup for pay.<domain> 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 DNS A record for the 'pay' subdomain of a given domain via Cloudflare DNS-over-HTTPS and reports existence, IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/pay/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-pay-domain-subdomain-4a5c2374
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TIwIXBnCu1qCLkA6oiFtl

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-pay-domain-subdomain-4a5c2374
```

Example prompt: Can you check whether the 'pay' subdomain exists for stripe.com — does pay.stripe.com have a DNS A record, and if so what are the IPs and TTL?

## When to prefer this

Use this endpoint when you need a quick, targeted existence check for the 'pay' subdomain of a specific domain without enumerating all subdomains. Prefer this over general DNS tools when you specifically care about payment-related subdomain infrastructure and want Cloudflare DoH resolution with minimal cost ($0.01 per lookup).

## Known failure modes

- Domain does not have a pay subdomain — returns no records found
- Invalid or malformed domain name provided — may return an error or empty result
- Cloudflare DoH upstream timeout or unavailability — request may fail
- Rate limiting or payment failure — endpoint returns 402 if payment is not processed

## How this service works

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

## Output

Returns whether the A record for pay.<domain> exists, any resolved IPv4 addresses, and the TTL of the record as reported by Cloudflare's DNS-over-HTTPS resolver.

## 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-pay-domain-subdomain-4a5c2374/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)