# DKIM Selector k2 Change Watch

> DKIM Selector k2 Change Watch is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-20).

Monitors the DKIM public key record for selector 'k2' of a given domain, detecting and reporting any changes compared to the previous check (retained 90 days).

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/watch/dns/dkim/k2?utm_source=zero.xyz
- Price: $0.02/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-k2-change-watch-4f9a0382
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5VF28PvTGQ93xbmH63PNp

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-k2-change-watch-4f9a0382
```

Example prompt: Keep an eye on the DKIM k2 selector record for example.com and tell me if it has changed since the last time you checked — show me what fields changed and their before/after values.

## When to prefer this

Use this endpoint when you need to continuously monitor whether the DKIM k2 selector record for a specific domain has changed, especially for scheduled alerting workflows. It is purpose-built for change detection with 90-day state retention, returning a structured diff — making it superior to a raw DKIM lookup endpoint when your goal is detecting rotation, unauthorized key changes, or verifying post-migration state.

## Known failure modes

- Domain does not have a k2 DKIM selector record (NXDOMAIN or empty TXT response)
- No previous check stored for domain within 90 days — changed field may default to false or null
- DNS lookup failure or timeout from upstream resolver
- Invalid or missing domain parameter resulting in a bad request error
- Rate limiting or payment failure for the $0.02 per call fee

## How this service works

Change watch for dkim selector k2: runs the check, compares it with the result from your previous call for the same domain (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.

## Output

Returns the current DKIM k2 selector record for the domain, a boolean 'changed' flag indicating whether it differs from the last stored result, a list of fields that changed with their before and after values, and the timestamp of when the record was last seen. Historical comparison data is retained for 90 days.

## 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-k2-change-watch-4f9a0382/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)