# DNS CNAME Lookup for cdn Subdomain via Cloudflare DoH

> DNS CNAME Lookup for cdn Subdomain via Cloudflare DoH 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 the cdn.<domain> subdomain using Cloudflare DNS over HTTPS and reports existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/cdn/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-cdn-subdomain-via-cloudflare-doh-0ca786fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uxF3XsceM8cTmjzhlkOCf

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-cdn-subdomain-via-cloudflare-doh-0ca786fa
```

Example prompt: Can you check whether cdn.example.com has a CNAME record set up — I want to know if the CDN subdomain exists and what it points to?

## When to prefer this

Use this endpoint when you need a quick, reliable check for the existence and value of the cdn.<domain> CNAME record without enumerating all subdomains. Prefer this over generic DNS tools when you specifically need the cdn host prefix resolved via Cloudflare DoH for consistency and privacy.

## Known failure modes

- Domain does not have a cdn subdomain — returns not found or empty records
- Invalid or malformed domain name input causes error
- Cloudflare DoH upstream timeout or unavailability
- Non-existent top-level domain returns NXDOMAIN

## How this service works

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

## Output

Returns whether the cdn.<domain> CNAME record exists, the CNAME record value(s) it contains, and the associated TTL. If the record does not exist, reports its absence. Response is sourced from 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-cname-lookup-for-cdn-subdomain-via-cloudflare-doh-0ca786fa/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)