# DKIM Selector 'kl' Public Key Lookup

> DKIM Selector 'kl' Public Key Lookup is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).

Looks up and parses the DKIM public key for the 'kl' selector of a given domain via Cloudflare DoH, returning key metadata including type, length, testing flag, and revocation status.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/dkim/kl?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dkim-selector-kl-public-key-lookup-b80c4fc2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mbD78UqE6V_Y5fXVpLl_z

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-kl-public-key-lookup-b80c4fc2
```

Example prompt: Can you check if the DKIM 'kl' selector is properly set up for example.com — specifically whether the public key exists, what type and length it is, and whether it's been revoked?

## When to prefer this

Use this endpoint when you specifically need to validate or inspect the DKIM configuration for the 'kl' selector (used by email providers such as Klaviyo). Prefer this over generic DNS TXT lookup endpoints when you need structured parsing of DKIM fields (v=, k=, key length, testing flag, revocation status) rather than raw TXT record text.

## Known failure modes

- Domain does not have a kl._domainkey TXT record — returns not found or empty result
- DNS resolution failure via Cloudflare DoH
- Malformed TXT record that cannot be parsed
- Empty p= field indicating a revoked key (returned as data, not an error)
- Invalid or non-existent domain input

## How this service works

DKIM public key for selector "kl" of a domain: looks up kl._domainkey.<domain> (TXT, Cloudflare DoH) and parses v=, k=, key type, public-key length, testing flag and whether the key is revoked (empty p=). Confirms that mail signed with the kl selector will verify. $0.01 per lookup.

## Output

Returns parsed DKIM TXT record data for kl._domainkey.<domain>, including: DKIM version (v=), key type (k=, e.g. rsa or ed25519), public key length in bits, whether the key is in testing mode (t=y flag), and whether the key is revoked (empty p= field). Confirms whether mail signed with the kl selector will successfully verify.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dkim-selector-kl-public-key-lookup-b80c4fc2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)