# DNS A Record Change Watch via Mullvad

> DNS A Record Change Watch via Mullvad 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 A record lookups for a domain through Mullvad's resolver, detects changes vs. prior call, and returns current answer with a changed flag and before/after diffs.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/watch/dns/a/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-a-record-change-watch-via-mullvad-bfcdf83d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U6Y8CdlZ441yZwueluvZu

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-a-record-change-watch-via-mullvad-bfcdf83d
```

Example prompt: Watch the DNS A record for example.com using the Mullvad resolver and tell me if it has changed since the last check — show me what changed and what the current IPs are.

## When to prefer this

Choose this endpoint when you need to detect DNS A record changes specifically as observed through Mullvad's privacy-focused resolver, which may differ from mainstream resolvers due to filtering or geolocation. Ideal for scheduled monitoring workflows where you want diff-style change detection with before/after values rather than just a raw current lookup. Prefer over generic DNS lookup endpoints when change alerting and historical comparison matter.

## Known failure modes

- Domain not found / NXDOMAIN — returns empty record set with no-change status
- No prior check stored — first call returns current state with changed=false and no diff
- Mullvad resolver unreachable — may return timeout or resolver error
- Invalid domain input — may return error or empty response
- 90-day history expiry — prior result purged, treated as first call

## How this service works

Change watch for dns a 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 DNS A record answer for the domain as seen through Mullvad's resolver, a boolean 'changed' flag comparing to the last stored result (retained 90 days), a list of fields that changed with before/after values, and a timestamp of when the record was last seen in that state.

## 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-a-record-change-watch-via-mullvad-bfcdf83d/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)