# DNS CNAME Lookup for owa Subdomain via Cloudflare DoH

> DNS CNAME Lookup for owa 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 2026-10-22).

Looks up the CNAME record of the owa.<domain> subdomain using Cloudflare DNS over HTTPS and returns whether it exists, its records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/owa/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-owa-subdomain-via-cloudflare-doh-63628f2d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6iDUGUmTmfpWNKC-bQYQm

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-owa-subdomain-via-cloudflare-doh-63628f2d
```

Example prompt: Can you check if contoso.com has a CNAME record set up for its owa subdomain — I want to know if it exists and what it points to?

## When to prefer this

Use this endpoint when you need a fast, targeted check on whether a specific domain has an owa subdomain configured as a CNAME — ideal for email infrastructure auditing, OSINT reconnaissance on whether an organization uses Outlook Web Access, or verifying DNS setup without doing broad subdomain enumeration.

## Known failure modes

- Domain does not have an owa subdomain — returns non-existence response
- Domain is invalid or malformed — may return DNS error
- Cloudflare DoH is temporarily unavailable — request may fail or time out
- Domain exists but owa host has an A record instead of CNAME — CNAME lookup returns empty

## How this service works

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

## Output

Returns whether the owa.<domain> CNAME record exists, the CNAME target record(s) it points to, and the TTL value of the record as resolved by 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-owa-subdomain-via-cloudflare-doh-63628f2d/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)