# DKIM Selector SendGrid Change Watch

> DKIM Selector SendGrid 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 SendGrid DKIM 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/sendgrid?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-sendgrid-change-watch-cb730430
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_prJJbFrkiQgnWhny_VFKi

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-sendgrid-change-watch-cb730430
```

Example prompt: Keep an eye on the SendGrid DKIM selector DNS record for acme.com and let me know if anything has changed since the last time you checked.

## When to prefer this

Choose this endpoint when you need to detect changes to a domain's SendGrid DKIM selector over time, rather than just fetching the current value. It is ideal for scheduled monitoring, security alerting, or post-migration validation workflows where knowing what changed (and how) is more important than a one-off lookup. Prefer sibling watch endpoints for other DKIM selectors (e.g. SES, s2) if the domain uses those providers instead.

## Known failure modes

- Domain not found or invalid — returns empty/null DNS result with changed=false
- First-time check for a domain — no previous result to compare against, changed will be false or null
- DNS lookup timeout or Cloudflare DoH error — may return an error or incomplete result
- SendGrid DKIM selector not present on the domain — returns absent/empty record
- Payment not processed — x402 payment required error

## How this service works

Change watch for dkim selector sendgrid: 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 SendGrid DKIM selector DNS record value, a boolean 'changed' flag indicating whether it differs from the previous call for the same domain, a list of fields that changed with their before and after values, and the timestamp of when the record was last seen. Historical comparisons are 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-sendgrid-change-watch-cb730430/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)