# Mail Exchanger (MX) Record Lookup

> Mail Exchanger (MX) Record Lookup 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 the MX hosts and their delivery priority values for a given domain by querying public DNS records.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-mx-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/mail-exchanger-mx-record-lookup-0afbce29
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_E81YdbRZSGvn-1vmstGpI

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 mail-exchanger-mx-record-lookup-0afbce29 -d '<json body>'
```

Example prompt: What are the MX records for stripe.com — I need to know which mail servers handle their email and what the delivery priorities are.

## When to prefer this

Use this endpoint when you need fast, authoritative DNS MX record data for a domain — such as identifying an organization's email provider, routing SMTP traffic, pre-validating an email domain before outreach, or investigating email infrastructure. Prefer this over full email validation services when you only need DNS-level mail exchanger data without inbox existence checks or deliverability scoring.

## Known failure modes

- Domain does not exist or has no MX records — returns empty or null result
- Invalid domain format supplied — may return validation error
- DNS lookup timeout or transient resolution failure
- Domain exists but has no MX record configured (relies on A record fallback not reflected here)

## How this service works

Mail exchanger lookup for Email operations: Return the domain MX hosts and their delivery priorities. DNS data only; does not send email or verify that an inbox exists.

## Output

A list of MX (mail exchanger) hostnames associated with the queried domain, each paired with its numeric delivery priority value. Lower priority numbers indicate preferred mail servers. This is raw DNS data only — it does not confirm inbox existence or attempt email delivery.

## 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/mail-exchanger-mx-record-lookup-0afbce29/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)