# DNS A Record Lookup for FTP Subdomain

> DNS A Record Lookup for FTP 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 2026-10-21).

Looks up the A record of the ftp.<domain> subdomain via Cloudflare DoH and reports whether it exists, its IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/ftp/a?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-a-record-lookup-for-ftp-subdomain-a04a7612
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pAMa5MIjmoKlA0I2ZD5P7

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-ftp-subdomain-a04a7612
```

Example prompt: Check if ftp.example.com exists by looking up its DNS A record — I want to know if the FTP host is configured for that domain and what IP it points to.

## When to prefer this

Use this endpoint when you need a quick, targeted check on whether an ftp.<domain> host is configured in DNS without enumerating all subdomains. Prefer it over general DNS resolvers when you want a structured, paid API response with clear existence signals and TTL data for specifically the FTP common subdomain pattern.

## Known failure modes

- Domain does not exist — returns NXDOMAIN with no records
- FTP subdomain not configured — exists flag false, empty records
- Invalid domain format — request may fail or return error
- Cloudflare DoH unavailable — upstream resolution failure
- Network timeout reaching DoH resolver

## How this service works

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

## Output

Returns whether the ftp.<domain> A record exists, the resolved IP address(es), the TTL value, and the DNS response code (e.g. NOERROR or NXDOMAIN), as answered by 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-a-record-lookup-for-ftp-subdomain-a04a7612/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)