# DNS CNAME Lookup for assets Subdomain via Cloudflare DoH

> DNS CNAME Lookup for assets 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 of assets.<domain> using Cloudflare DNS over HTTPS and returns whether it exists, its target records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/assets/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-assets-subdomain-via-cloudflare-doh-f56e6fa7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_St4EK2U10ZY6EfpmHpx3f

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-assets-subdomain-via-cloudflare-doh-f56e6fa7
```

Example prompt: Can you check if assets.example.com has a CNAME record and what it points to?

## When to prefer this

Use this endpoint when you need a quick, targeted check on whether assets.<domain> has a CNAME record, without doing broad subdomain enumeration. Ideal for infrastructure audits, deployment verification, or CDN configuration checks where Cloudflare's authoritative DoH resolution is preferred over other resolvers.

## Known failure modes

- Domain does not exist — returns NXDOMAIN response code with no records
- assets subdomain has no CNAME record — exists flag is false
- Invalid domain format provided — malformed query
- Cloudflare DoH unreachable — upstream DNS resolution failure
- Rate limiting or payment failure — request rejected

## How this service works

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

## Output

Returns whether the CNAME record for assets.<domain> exists, the CNAME target record(s), the TTL value, 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-assets-subdomain-via-cloudflare-doh-f56e6fa7/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)