# DNS A Record Lookup for sandbox Subdomain

> DNS A Record Lookup for sandbox 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 2026-10-22).

Looks up the DNS A record for sandbox.<domain> via Cloudflare DoH and reports existence, IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/sandbox/a?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-a-record-lookup-for-sandbox-subdomain-bd74e56f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AsE7DnxIZLFiDBahTVMy-

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-sandbox-subdomain-bd74e56f
```

Example prompt: Check if sandbox.acme.com exists in DNS — look up its A record and tell me the IP and TTL if it resolves.

## When to prefer this

Use this endpoint when you need a quick, targeted check for the sandbox subdomain on a given domain without enumerating all subdomains. It's ideal for pre-flight checks before API integrations, environment audits, or confirming sandbox infrastructure is live. Prefer this over general DNS tools when you specifically care about the sandbox host and want A record resolution via Cloudflare DoH.

## Known failure modes

- Domain does not exist — NXDOMAIN response with no records
- sandbox subdomain not configured — query returns empty answer section
- Invalid domain format provided — malformed request error
- Cloudflare DoH upstream timeout — transient lookup failure
- Payment not made — 402 response requiring x402 payment of $0.01 USDC

## How this service works

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

## Output

Returns whether sandbox.<domain> has an A record, the resolved IP address(es), and the TTL value, based on a Cloudflare DoH query.

## 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-sandbox-subdomain-bd74e56f/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)