# DNS CNAME Change Watch via NextDNS

> DNS CNAME Change Watch via NextDNS is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).

Monitors CNAME DNS records for a domain via NextDNS, detecting changes by comparing the current lookup result against the previously stored result and returning a diff with before/after values.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/watch/dns/cname/via/nextdns?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-cname-change-watch-via-nextdns-4f3ce029
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tnTRuAZHF0bmRKv4fF095

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 dns-cname-change-watch-via-nextdns-4f3ce029
```

Example prompt: Watch for any CNAME record changes on example.com using NextDNS and tell me if anything has changed since the last check, including what the old and new values were.

## When to prefer this

Choose this endpoint when you need to detect CNAME DNS record changes over time specifically using NextDNS as the resolver (which applies security filtering), and you want a built-in diffing mechanism rather than managing your own state. Prefer it over plain DNS lookup endpoints when you need change detection with before/after field-level diffs and last-seen timestamps without building your own comparison logic.

## Known failure modes

- Domain not found or invalid domain name returns an error
- No previous result stored (first call) may return changed=false or a baseline-only response
- NextDNS resolution failure or timeout
- Domain has no CNAME record resulting in an empty answer
- Stored state expired after 90 days, resetting the comparison baseline

## How this service works

Change watch for dns cname via nextdns: 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 CNAME record answer for the domain, a boolean 'changed' flag indicating whether results differ from the previous check (stored up to 90 days), a list of changed fields with their before and after values, and a 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/dns-cname-change-watch-via-nextdns-4f3ce029/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)