# DNS CNAME Lookup for pop3 Subdomain via Cloudflare DoH

> DNS CNAME Lookup for pop3 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 pop3.<domain> using Cloudflare DNS over HTTPS and returns whether it exists, its records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/pop3/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-pop3-subdomain-via-cloudflare-doh-cfbfa39e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bgYk3QnDafWQ57V_tMZbg

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-pop3-subdomain-via-cloudflare-doh-cfbfa39e
```

Example prompt: Check if pop3.gmail.com has a CNAME record configured — I want to know if it exists, what it points to, and what the TTL is.

## When to prefer this

Use this endpoint when you need a quick, targeted check on whether a specific domain has a POP3 mail host configured as a CNAME, without needing to enumerate all subdomains. Prefer this over general DNS tools when you specifically want the CNAME record type for the pop3 subdomain and want Cloudflare's authoritative DoH response with TTL data.

## Known failure modes

- Domain does not exist — returns NXDOMAIN or empty record set
- No CNAME record at pop3.<domain> — host exists but record type absent
- Cloudflare DoH service unavailable — upstream DNS resolution failure
- Invalid or malformed domain input — request error
- Network timeout on DNS over HTTPS resolution

## How this service works

CNAME record of pop3.<domain>: looks up the pop3 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 pop3 without enumerating subdomains. $0.01 per lookup.

## Output

Returns whether the pop3.<domain> CNAME record exists, the record data (target hostname it points to), the TTL value, and the DNS response code. If no CNAME record exists, reports its absence.

## 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-pop3-subdomain-via-cloudflare-doh-cfbfa39e/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)