# Domain Format Check for Vendor Screening

> Domain Format Check 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 that a hostname has correct public-domain syntax and normalizes internationalized domain names (IDNs) using DNS data only, without sending email or verifying inbox existence.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-domain-format-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/domain-format-check-for-vendor-screening-3efa085a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-98NkW19SlNg0WM5gqmJP

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 domain-format-check-for-vendor-screening-3efa085a -d '<json body>'
```

Example prompt: Can you check whether 'münchen-solutions.de' is a valid public domain and give me the normalized ASCII version? I need this for vendor screening.

## When to prefer this

Choose this endpoint when you need lightweight, fast domain syntax validation and IDN normalization without triggering any network activity like SMTP probing or MX lookups. It is ideal for vendor screening pipelines, procurement due diligence, or any workflow where you need to confirm a hostname is properly formed before storing or acting on it.

## Known failure modes

- Invalid or malformed domain string returns a syntax error or negative validation result
- Private/reserved hostnames (e.g. localhost, .internal) may be flagged as non-public
- IDN normalization may fail for unsupported Unicode character sequences
- Empty or missing domain field causes a request validation error

## How this service works

Domain format check for Vendor screening: Check a hostname for valid public-domain syntax and normalize IDNs. DNS data only; does not send email or verify that an inbox exists.

## Output

Returns whether the submitted hostname passes valid public-domain syntax rules, along with the normalized (ASCII/punycode) form of any internationalized domain name. Does not perform email delivery checks or inbox verification.

## 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/domain-format-check-for-vendor-screening-3efa085a/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)