# DKIM Selector Email Change Watch

> DKIM Selector Email 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 TXT record for the 'email' selector of a domain and returns whether it has changed since the last check, with before/after field diffs.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/watch/dns/dkim/email?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-email-change-watch-a2ccbe3b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h8v-5nhNwWdROd-ETnTeX

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-email-change-watch-a2ccbe3b
```

Example prompt: Keep an eye on the DKIM 'email' selector record for example.com and tell me if it has changed since the last check — I want to know what fields changed and what the old vs new values are.

## When to prefer this

Choose this endpoint when you need to detect changes to the 'email' DKIM selector specifically (email._domainkey.<domain>), rather than other selectors like 'mail' or 'mj'. It is ideal for scheduled polling workflows where you want diff output (before/after field values) rather than just the raw current record. Prefer it over a plain DKIM lookup when change detection and alerting over time is the primary goal.

## Known failure modes

- Domain not found or does not exist — DNS resolution failure returned
- No previous check stored (first call) — 'changed' will be false or null with no diff
- DKIM selector 'email._domainkey.<domain>' TXT record does not exist — returns empty/not-found result
- Payment not processed — x402 payment required error
- Stale baseline if last check was more than 90 days ago — history expired, treated as first call

## How this service works

Change watch for dkim selector email: 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 TXT record for the 'email' selector, a boolean 'changed' flag indicating whether it differs from the previous check (stored up to 90 days), a diff of changed fields with before/after values, and the timestamp of when the record was last seen.

## 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-email-change-watch-a2ccbe3b/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)