# dns-txt-voip-subdomain

> dns-txt-voip-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 voip.<domain> subdomain via Cloudflare DoH and reports its existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/voip/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-voip-subdomain-3d15d81f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rV1pebKEnci90M1Ix0hF6

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-voip-subdomain-3d15d81f
```

Example prompt: Can you check if example.com has a voip subdomain configured in DNS — look up the TXT record for voip.example.com and tell me if it exists and what it says?

## When to prefer this

Use this endpoint when you need a quick, inexpensive existence check for VoIP-related DNS TXT records on a specific domain without performing full subdomain enumeration. Prefer it over generic DNS tools when you specifically need the voip.<domain> TXT record and want a focused, single-purpose lookup at low cost ($0.01 per call).

## Known failure modes

- Domain does not exist — returns non-existence result
- No TXT record for voip subdomain — returns empty or NXDOMAIN
- Network error reaching Cloudflare DoH — lookup fails
- Invalid domain format provided — query rejected
- Transient DNS resolution failure — retry may succeed

## How this service works

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

## Output

Returns whether the voip.<domain> TXT DNS record exists, the content of the TXT record(s) if present, and the TTL value. If the record does not exist, it reports its absence.

## 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-voip-subdomain-3d15d81f/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)