# DKIM Selector protonmail2 Change Watch

> DKIM Selector protonmail2 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 protonmail2 selector DNS record for a domain and returns whether it has changed since the last check, along with before/after field diffs.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/watch/dns/dkim/protonmail2?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-protonmail2-change-watch-ef235158
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_v7QqrocNp7GM3VqC9gnP3

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-protonmail2-change-watch-ef235158
```

Example prompt: Watch the protonmail2 DKIM selector for example.com and tell me if it has changed since the last check — show me what fields changed with the before and after values.

## When to prefer this

Use this endpoint when you need to continuously monitor whether the ProtonMail DKIM selector (protonmail2) for a specific domain has changed over time, and want structured change detection with field-level diffs rather than just a raw DNS lookup. Prefer this over a plain DKIM lookup endpoint when you need alerting, audit trails, or change history. Best suited for scheduled polling workflows where detecting email security configuration drift matters.

## Known failure modes

- Domain not found or has no protonmail2 DKIM record — returns current empty/null result with no previous comparison if first call
- No previous snapshot exists (first call for domain) — changed flag will be false or undefined, no diff available
- DNS resolution failure — may return error or empty result
- Snapshot older than 90 days has been purged — comparison resets as if first call
- Payment not processed — request rejected before DNS lookup is performed

## How this service works

Change watch for dkim selector protonmail2: 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 protonmail2 selector record value, a boolean indicating whether it changed since the last call for the same domain, a list of fields that changed with their before and after values, and a timestamp of when the record was last seen. Results are compared against a stored snapshot 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-protonmail2-change-watch-ef235158/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)