# dns-aaaa-sftp-subdomain

> dns-aaaa-sftp-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 AAAA (IPv6) DNS record for the sftp subdomain of a given domain via Cloudflare DNS-over-HTTPS and reports whether it exists, its records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/sftp/aaaa?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-aaaa-sftp-subdomain-cedb947b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rvXtzoztKKyelLvo__Dac

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-aaaa-sftp-subdomain-cedb947b
```

Example prompt: Can you check if sftp.example.com has an IPv6 address configured — look up the AAAA record for the sftp subdomain of example.com and tell me if it exists and what the TTL is?

## When to prefer this

Use this endpoint when you specifically need to check whether a domain has an IPv6-accessible SFTP host (sftp.<domain>) without needing to enumerate all subdomains. Ideal for quick existence checks during DNS audits, pre-connection validation, or infrastructure discovery workflows where IPv6 support for file transfer services matters.

## Known failure modes

- Domain does not exist — NXDOMAIN response with no records
- sftp subdomain not configured — returns empty record set
- Invalid domain input — malformed domain may cause lookup error
- Cloudflare DoH unreachable — upstream timeout or error
- Domain has only A (IPv4) record, no AAAA — returns empty AAAA result

## How this service works

AAAA record of sftp.<domain>: looks up the sftp host under the domain you give (AAAA via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like sftp without enumerating subdomains. $0.01 per lookup.

## Output

Returns whether the AAAA record for sftp.<domain> exists, the IPv6 address records (if present), the TTL value, 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-aaaa-sftp-subdomain-cedb947b/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)