# dns-cname-via-mullvad-watch

> dns-cname-via-mullvad-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 2026-10-21).

Runs a DNS CNAME lookup via Mullvad, compares it to the previous result (stored 90 days), and returns the current answer along with a changed flag and before/after diff.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/watch/dns/cname/via/mullvad?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-via-mullvad-watch-24e888ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DKaA2y1Y6lSqJa_o0iXw8

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-via-mullvad-watch-24e888ad
```

Example prompt: Keep an eye on the CNAME record for shop.example.com using Mullvad DNS and let me know if it changes from what you last saw — tell me what the old and new values were.

## When to prefer this

Use this endpoint when you need change-detection semantics for DNS CNAME records specifically via Mullvad's resolver — ideal for scheduled polling workflows where you want automatic diffing against the last known state without maintaining your own state store. Prefer this over raw DNS CNAME lookups when you need before/after change visibility or want to detect DNS hijacking, CDN migrations, or routing changes from Mullvad's network vantage point.

## Known failure modes

- Domain not provided or malformed — request fails with a validation error
- Domain has no CNAME record — returns empty record set with changed flag relative to prior state
- Mullvad DNS resolver is unreachable — may return a timeout or upstream error
- No prior result stored (first-ever call) — changed flag is false or null with no diff available
- Domain cached result expired past 90 days — treated as a fresh first call with no diff

## How this service works

Change watch for dns cname via mullvad: 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 records as answered by Mullvad DNS, a boolean 'changed' flag indicating whether the answer differs from the previous call for the same domain, a diff of fields that changed with before/after values, and a timestamp of when the previous answer was last seen. Results from previous calls 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/dns-cname-via-mullvad-watch-24e888ad/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)