# DKIM Selector Lookup

> DKIM Selector Lookup 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 to retrieve the public key and policy configuration for a given domain and selector name.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-dkim-selector-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/dkim-selector-lookup-76f9da97
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e7_4wga26D9xD1u7gI2xO

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-lookup-76f9da97 -d '<json body>'
```

Example prompt: Can you look up the DKIM selector 'google' under _domainkey for the domain mailchimp.com and tell me what DNS record it returns?

## When to prefer this

Use this endpoint when you need a quick, low-cost DNS-only lookup of a specific DKIM selector record without sending email or verifying inbox existence. Prefer this over full email verification services when you only need the raw DNS DKIM data, such as during configuration audits, key rotation checks, or debugging email authentication failures. It is not a substitute for full SPF/DMARC analysis or end-to-end email deliverability testing.

## Known failure modes

- Domain does not exist in DNS — NXDOMAIN response
- Selector not found under _domainkey — empty or missing TXT record
- DNS timeout or resolver error — no response returned
- Malformed domain or selector input — validation error
- DKIM record exists but is incorrectly formatted — raw text returned without parsing guarantees

## How this service works

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

## Output

Returns the raw DNS TXT record data found at {selector}._domainkey.{domain}, including the DKIM public key (p= field), version tag (v=DKIM1), key type (k=), and any other DKIM policy flags present in the record. If no record is found, returns an indication that the selector does not exist in DNS.

## 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-lookup-76f9da97/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)