# IPv4 Address Lookup for Email Domain Operations

> IPv4 Address Lookup for Email Domain Operations is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Returns public DNS A records (IPv4 addresses) for a given hostname, focused on email-related domain lookups.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-ipv4-records-email-operations?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ipv4-address-lookup-for-email-domain-operations-78b1f5db
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-H4PnkzcB9hlhVpW6MIuK

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 ipv4-address-lookup-for-email-domain-operations-78b1f5db -d '<json body>'
```

Example prompt: Can you look up the public IPv4 DNS A records for the domain sendgrid.net?

## When to prefer this

Use this endpoint when you need to resolve a public domain name to its IPv4 addresses as part of an email-related workflow, such as enriching sender information, validating domain reachability, or auditing email infrastructure. Prefer this over general DNS tools when the context is specifically email domain operations and you need a lightweight, pay-per-call DNS A record lookup.

## Known failure modes

- Domain does not exist in public DNS — returns empty or NXDOMAIN response
- Invalid domain format provided — may return error or empty result
- Domain has no A records (e.g. only has MX or CNAME records) — returns empty list
- Transient DNS resolution failure — may return error
- Private or internal hostnames not resolvable via public DNS

## How this service works

IPv4 address lookup for Email operations: Return public A records for the hostname. DNS data only; does not send email or verify that an inbox exists.

## Output

A list of public IPv4 addresses (DNS A records) associated with the queried hostname, sourced from public DNS. Does not include MX records, email verification, or inbox existence checks.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "default": "example.com",
   "description": "Public DNS domain, e.g. example.com."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ipv4-address-lookup-for-email-domain-operations-78b1f5db/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)