# DKIM Selector fm1 Change Watch

> DKIM Selector fm1 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 2026-10-19).

Monitors the DKIM fm1 selector DNS record for 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/fm1?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dkim-selector-fm1-change-watch-b7fed261
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ryRuJQRPSmT94iZAvfVnQ

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-fm1-change-watch-b7fed261
```

Example prompt: Keep an eye on the DKIM fm1 selector for example.com and let me know if anything about it has changed since you last checked — I want to see exactly which fields changed and what the old vs new values were.

## When to prefer this

Choose this endpoint when you need to detect changes to a domain's DKIM fm1 selector over time rather than just retrieving the current record. It is purpose-built for polling/scheduling workflows where you want change detection with before/after diffs, using a 90-day comparison window. Prefer it over a plain DNS lookup when you need to be alerted to email authentication record modifications, config drift, or unauthorized changes.

## Known failure modes

- Domain not found or has no DKIM fm1 selector record — returns empty or not-found result
- First-time call for a domain has no previous baseline — 'changed' will be false or undefined
- Domain input missing from query — request fails with validation error
- DNS resolution timeout or upstream failure — transient error returned
- Record unchanged since last check — changed=false with no diff fields

## How this service works

Change watch for dkim selector fm1: 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 fm1 selector record for the queried domain, a boolean 'changed' flag indicating if it differs from the last cached result (retained 90 days), a list of fields that changed each with before and after values, and the timestamp 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-fm1-change-watch-b7fed261/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)