# dns-txt-demo-subdomain

> dns-txt-demo-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 'demo' subdomain of a given domain via Cloudflare DoH and reports its existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/demo/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-demo-subdomain-ceff02f5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jP9GD0TWHQH8pU7-ezr8e

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-demo-subdomain-ceff02f5
```

Example prompt: Can you check if demo.acmecorp.com has any TXT DNS records and tell me what they are along with the TTL?

## When to prefer this

Choose this endpoint when you specifically need the TXT record for the 'demo' subdomain of a domain, want a fast existence check without enumerating all subdomains, and prefer Cloudflare DoH resolution. Ideal for lightweight infrastructure audits, DNS configuration verification, or pre-deployment checks for demo environments.

## Known failure modes

- Domain does not exist — NXDOMAIN response, no records returned
- No TXT record for the demo subdomain — exists flag false, empty records
- Malformed domain input — lookup may fail or return an error
- Cloudflare DoH upstream timeout or error — service may return an error response
- Payment failure — x402 payment not processed, request rejected

## How this service works

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

## Output

Returns whether the demo.<domain> TXT record exists, the actual TXT record content(s) if present, and the TTL value, 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-txt-demo-subdomain-ceff02f5/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)