# DNS TXT Record Lookup for VPN Subdomain

> DNS TXT Record Lookup for VPN 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 TXT DNS records for the vpn.<domain> subdomain using Cloudflare DNS over HTTPS (DoH) and reports existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/vpn/txt?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-txt-record-lookup-for-vpn-subdomain-8d9830bb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gupYWr3eGq8FKkEu8svqi

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-txt-record-lookup-for-vpn-subdomain-8d9830bb
```

Example prompt: Can you check if example.com has a VPN subdomain set up — look up the TXT records for vpn.example.com via Cloudflare DoH and tell me if it exists and what the TTL is?

## When to prefer this

Use this endpoint when you need a quick, passive existence check for a VPN subdomain on a specific domain without performing active subdomain enumeration. It is ideal for security auditing, IT inventory checks, or pre-connection validation where only the vpn.<domain> host is of interest and Cloudflare DoH is an acceptable resolver.

## Known failure modes

- Domain does not exist — NXDOMAIN returned with no records
- vpn subdomain not configured — empty record set returned
- Invalid domain input causing query failure
- Cloudflare DoH upstream timeout or unavailability
- Malformed domain string causing resolution error

## How this service works

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

## Output

Returns whether the vpn.<domain> subdomain exists in DNS, its TXT record values, the TTL of those records, and the DNS response code (e.g. NOERROR or NXDOMAIN) as resolved via Cloudflare DoH.

## 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-txt-record-lookup-for-vpn-subdomain-8d9830bb/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)