# DNS CNAME Change Watch via CleanBrowsing

> DNS CNAME Change Watch via CleanBrowsing 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 DNS CNAME records for a domain via CleanBrowsing and returns whether the record has changed since the last check, with before/after field diffs.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/watch/dns/cname/via/cleanbrowsing?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-cleanbrowsing-d76f1afd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e21MIOoavcwK8noL1t-M7

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-cleanbrowsing-d76f1afd
```

Example prompt: Keep an eye on the CNAME record for example.com using CleanBrowsing and tell me if it's changed since the last time you checked — show me what was different and when it was last seen.

## When to prefer this

Choose this endpoint when you need change-detection semantics on top of a raw CNAME lookup specifically answered by CleanBrowsing's security-filtered DNS resolver. It is ideal for scheduled polling workflows where you want to be alerted only when the CNAME value drifts, rather than inspecting raw records every time. Prefer it over a plain CNAME lookup endpoint when historical comparison, diff output, and a 'changed' flag are required.

## Known failure modes

- Domain not provided or invalid — query fails with input validation error
- No previous check stored (first call) — 'changed' may be null or false with no diff available
- CleanBrowsing resolver unreachable — lookup fails or times out
- Domain has no CNAME record — returns empty record set with no diff
- Stored result expired after 90 days — baseline lost, treated as first call

## How this service works

Change watch for dns cname via cleanbrowsing: 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, a boolean 'changed' flag indicating whether it differs from the previous check (stored up to 90 days), a list of fields that changed 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-cleanbrowsing-d76f1afd/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)