# DNS CNAME Lookup for m.<domain> via Cloudflare DoH

> DNS CNAME Lookup for m.<domain> 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 2026-10-22).

Looks up the CNAME record for the 'm' subdomain of a given domain using Cloudflare DNS over HTTPS, returning existence status, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/m/cname?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-cname-lookup-for-m-domain-via-cloudflare-doh-9d41b435
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bEpT2RvjOrHkDSP4Xx_4W

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-m-domain-via-cloudflare-doh-9d41b435
```

Example prompt: Can you check if m.example.com has a CNAME record? I want to know if the mobile subdomain exists and what it points to.

## When to prefer this

Use this endpoint when you need a quick, targeted check on whether the 'm' subdomain of a specific domain has a CNAME record, without doing full subdomain enumeration. It is preferable over generic DNS tools when you specifically need the Cloudflare DoH perspective on the m host, and when you want a simple pay-per-lookup approach without standing up your own DNS resolver.

## Known failure modes

- Domain does not exist — returns NXDOMAIN or empty records
- m subdomain has no CNAME record (may have A/AAAA instead) — returns no records but no error
- Cloudflare DoH resolver temporarily unavailable — may return timeout or resolver error
- Invalid domain format provided — likely returns an error or empty response
- Domain exists but m host has no DNS records at all — returns existence=false

## How this service works

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

## Output

Returns whether the m.<domain> CNAME record exists, the actual CNAME record value(s), the TTL, and the DNS response code as resolved by Cloudflare's DoH resolver.

## 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-m-domain-via-cloudflare-doh-9d41b435/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)