# DNS TXT Record Lookup for pop3 Subdomain

> DNS TXT Record Lookup for pop3 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 2026-10-21).

Looks up TXT records for the pop3.<domain> subdomain via Cloudflare DNS over HTTPS and reports existence, record values, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/pop3/txt?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-txt-record-lookup-for-pop3-subdomain-c7e8cdbf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ep5AObDmdgUbN31M7JwFj

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-txt-record-lookup-for-pop3-subdomain-c7e8cdbf
```

Example prompt: Can you check whether pop3.rallylive.ca has any TXT records set up in DNS, and tell me what they are along with the TTL?

## When to prefer this

Use this endpoint when you need a targeted, fast existence check specifically for the pop3 subdomain's TXT records on a given domain without performing broad subdomain enumeration. Ideal for mail infrastructure audits, DNS configuration validation, or checking pop3 host presence for a known domain.

## Known failure modes

- Domain does not exist — returns NXDOMAIN or no records found
- pop3 subdomain has no TXT records — returns empty record set
- Malformed domain input causes lookup failure
- Cloudflare DoH temporarily unavailable — request times out
- Invalid or missing domain parameter

## How this service works

TXT record of pop3.<domain>: looks up the pop3 host under the domain you give (TXT 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> subdomain exists in DNS, its TXT record values, and the TTL of those records, 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-txt-record-lookup-for-pop3-subdomain-c7e8cdbf/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)