# DNS CNAME Lookup for portal Subdomain

> DNS CNAME Lookup for portal 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 CNAME record for portal.<domain> via Cloudflare DNS over HTTPS and reports existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/portal/cname?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-cname-lookup-for-portal-subdomain-b7c59d05
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GERLD8CGTWBEL2DQ2J_8a

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-cname-lookup-for-portal-subdomain-b7c59d05
```

Example prompt: Check if example.com has a portal subdomain configured — I want to know the CNAME record it points to and its TTL.

## When to prefer this

Use this endpoint when you need a quick, low-cost existence check for the portal subdomain of a specific domain without enumerating all subdomains. It is ideal for validating customer DNS configurations, auditing whether SaaS portals are set up, or reconnaissance tasks focused on the common 'portal' host pattern. Prefer it over generic CNAME endpoints when you specifically care about the portal subdomain.

## Known failure modes

- Domain does not exist — NXDOMAIN response with no records returned
- portal subdomain has no CNAME record configured — empty record set
- Malformed or missing domain input parameter causes request failure
- Cloudflare DoH upstream timeout or error
- Rate limiting or payment failure returns 402

## How this service works

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

## Output

Returns whether the CNAME record for portal.<domain> exists, the CNAME target hostname it points to, the TTL value in seconds, and the DNS response code (e.g. NOERROR or NXDOMAIN).

## 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-cname-lookup-for-portal-subdomain-b7c59d05/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)