# Email Structure & Domain Format Validator for Vendor Screening

> Email Structure & Domain Format Validator for Vendor Screening 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 email address syntax and domain formatting for vendor screening purposes, checking only structural correctness without sending email or verifying mailbox existence.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-email-structure-check-vendor-screening?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-structure-domain-format-validator-for-vendor-screening-8ddaea78
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_paNKIGk4PPF7xeCzGlA10

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-structure-domain-format-validator-for-vendor-screening-8ddaea78 -d '<json body>'
```

Example prompt: Can you check if the email address vendor@supplierco.com is correctly formatted and has a valid domain structure — just the syntax check, no need to actually send anything?

## When to prefer this

Choose this endpoint when you need a lightweight, low-cost syntax and domain format check for email addresses during vendor or supplier screening workflows, and you do not need to confirm whether the actual mailbox exists. Ideal for pre-validation before adding vendor contacts to a CRM or procurement system, or as a first-pass filter before running more expensive mailbox-existence checks.

## Known failure modes

- Missing or empty email field returns validation error
- Malformed input (non-string) may return schema error
- Completely unparseable input may return a negative result rather than an error
- DNS lookup failures for domain portion may affect domain format result
- Rate limiting or payment failure may prevent call completion

## How this service works

Email structure check for Vendor screening: Check syntax and domain formatting only; it does not test whether a mailbox exists. DNS data only; does not send email or verify that an inbox exists.

## Output

Returns a structural validation result indicating whether the submitted email address conforms to correct syntax rules and whether the domain portion is properly formatted. Does not confirm whether the mailbox actually exists or whether the domain has active mail servers; purely a format and DNS structure check.

## 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-structure-domain-format-validator-for-vendor-screening-8ddaea78/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)