# dns-cname-autoconfig-subdomain

> dns-cname-autoconfig-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 2026-10-22).

Looks up the CNAME record for autoconfig.<domain> via Cloudflare DNS over HTTPS and reports whether it exists, its records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/autoconfig/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-autoconfig-subdomain-d1e5f0bb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s_EIKOm_R4OYsjQxz9CcX

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-autoconfig-subdomain-d1e5f0bb
```

Example prompt: Can you check whether example.com has a CNAME record set up for its autoconfig subdomain — does autoconfig.example.com exist and where does it point?

## When to prefer this

Use this endpoint when you need a quick, targeted existence and CNAME check specifically for the autoconfig subdomain of a domain — ideal for verifying email client autoconfiguration DNS setup without doing broad subdomain enumeration. Prefer this over general DNS lookup tools when the host (autoconfig) is fixed and you just need a lightweight per-domain check.

## Known failure modes

- Domain does not have an autoconfig subdomain (NXDOMAIN response)
- Domain name is invalid or malformed
- Cloudflare DoH upstream unavailable or timeout
- No CNAME record exists but other record types may be present at that host

## How this service works

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

## Output

Returns whether the autoconfig.<domain> CNAME record exists, the CNAME target records if present, the TTL value, and the DNS response code (e.g. NOERROR or NXDOMAIN) as answered by Cloudflare DoH.

## 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-autoconfig-subdomain-d1e5f0bb/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)