# Email Domain Routing Check

> Email Domain Routing Check 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 the format of an email address and checks whether its domain has MX (Mail Exchanger) DNS records, without sending any email or verifying inbox existence.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-email-domain-check-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/email-domain-routing-check-c4416a96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_25J4L-tolq_WrxXXo_s5U

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-routing-check-c4416a96 -d '<json body>'
```

Example prompt: Can you check whether john.smith@acmecorp.io is a properly formatted email and if the acmecorp.io domain actually has MX records set up to receive mail?

## When to prefer this

Use this endpoint when you need a lightweight, low-cost DNS-level check to filter out obviously invalid or unroutable email addresses before storing, messaging, or processing them. It is ideal for pre-validation at form submission, list hygiene, or lead qualification pipelines where you need more than format-checking but do not need full SMTP mailbox verification.

## Known failure modes

- Malformed email input that fails basic shape check — returns invalid format error
- Domain exists but has no MX records — reported as unroutable even if domain is live
- Temporary DNS lookup failure — may return inconclusive result
- Email format is valid but domain is a known catch-all or non-existent TLD — DNS check may still fail
- Missing or empty email field — returns missing parameter error

## How this service works

Email domain routing check for Email 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 submitted email address passes format/shape validation and whether its domain has MX DNS records configured, indicating the domain is set up to receive email. Does not confirm inbox existence or attempt delivery.

## 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-routing-check-c4416a96/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)