# DKIM Selector DNS Lookup for Vendor Screening

> DKIM Selector DNS Lookup 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).

Looks up a DKIM selector record under _domainkey in DNS for a given domain, returning raw DNS data to support vendor email authentication screening.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-dkim-selector-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/dkim-selector-dns-lookup-for-vendor-screening-7e43aa92
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K-ckquIzzLpCaUuXS246f

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 dkim-selector-dns-lookup-for-vendor-screening-7e43aa92 -d '<json body>'
```

Example prompt: Can you look up the DKIM selector 'google' for the domain acme-supplier.com in DNS? I need to verify their email authentication setup before we onboard them as a vendor.

## When to prefer this

Use this endpoint when you need to perform DNS-level DKIM record validation for a specific domain and selector, particularly in vendor screening, supplier onboarding, or email security audit workflows. It is appropriate when you only need raw DNS data — not full email deliverability analysis or inbox verification.

## Known failure modes

- Domain does not exist in DNS — returns NXDOMAIN or empty result
- Selector not found — no TXT record exists at selector._domainkey.domain
- Malformed domain input — validation error
- DNS timeout or resolution failure — transient network error
- Selector string is empty or invalid — bad request error

## How this service works

DKIM selector lookup for Vendor screening: Look up a supplied DKIM selector under _domainkey. DNS data only; does not send email or verify that an inbox exists.

## Output

Returns raw DNS TXT record data for the specified DKIM selector under the _domainkey subdomain of the given domain, including the public key and policy fields if the record exists. Does not send email or verify inbox existence.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "default": "example.com",
   "description": "Public DNS domain, e.g. example.com."
  },
  "selector": {
   "type": "string",
   "default": "default"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dkim-selector-dns-lookup-for-vendor-screening-7e43aa92/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)