# Email Domain MX Record Validator

> Email Domain MX Record Validator 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).

Validates an email address format and checks whether its domain has MX (mail exchange) DNS records, without sending any email or verifying inbox existence.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-email-domain-check-sales-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/email-domain-mx-record-validator-5b72ead4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2MdASIPFjABxWomZdCbz7

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 email-domain-mx-record-validator-5b72ead4 -d '<json body>'
```

Example prompt: Can you check if the email address john.smith@acmecorp.com is properly formatted and whether its domain actually has mail servers set up to receive email?

## When to prefer this

Choose this endpoint when you need a lightweight, low-cost ($0.01) check to confirm that an email address is syntactically valid AND that its domain is DNS-routable for mail, without actually sending a message or doing a full SMTP handshake. Ideal for pre-CRM import screening, sales prospecting list hygiene, or signup form validation pipelines where speed and cost matter more than full inbox verification.

## Known failure modes

- Malformed input — email field is empty or missing, returns validation error
- Domain has no MX records — valid format but domain cannot receive email
- DNS lookup timeout — transient network issue prevents MX record resolution
- Invalid email shape — missing @ symbol or domain part, fails format check
- Payment failure — insufficient USDC balance for the $0.01 per-call fee

## How this service works

Email domain routing check for Sales operations: Validate an email address shape and check whether its domain has MX records. DNS data only; does not send email or verify that an inbox exists.

## Output

Returns whether the email address string is correctly formatted (valid shape) and whether the domain portion has MX records present in DNS, indicating the domain is configured to receive email. Does not confirm inbox existence or send any messages.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "default": "user@example.com",
   "description": "Email address to inspect."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-domain-mx-record-validator-5b72ead4/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)