# dns-txt-auth-subdomain

> dns-txt-auth-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 TXT DNS record for the 'auth' subdomain of a given domain via Cloudflare DoH and reports existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/auth/txt?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-txt-auth-subdomain-185a054f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dGV3xw2mmVlmxgGl-P3QG

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-auth-subdomain-185a054f
```

Example prompt: Can you check if auth.rallylive.ca has any TXT DNS records set — I want to know if the auth subdomain exists and what its TTL is?

## When to prefer this

Use this endpoint when you need a fast, targeted check for the TXT record of the 'auth' subdomain specifically, without needing to enumerate other subdomains. Prefer this over generic DNS lookup tools when you want a pre-scoped, single-call existence check for auth.<domain> via Cloudflare DoH with a simple pay-per-use pricing model.

## Known failure modes

- Domain does not exist — NXDOMAIN response indicating the apex domain itself is not found
- auth subdomain has no TXT record — empty or NOERROR with no answer section
- Malformed domain input causing resolver error
- Cloudflare DoH upstream timeout or unavailability
- Rate limiting or payment failure (x402) blocking the request

## How this service works

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

## Output

Returns whether the TXT record for auth.<domain> exists, the record values if present, the TTL, and the raw DNS response data retrieved 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-auth-subdomain-185a054f/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)