# DNS A Record Change Watch via OpenDNS

> DNS A Record Change Watch via OpenDNS 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 records for a domain via OpenDNS, comparing current results against the previous check (stored 90 days) and returning whether the record changed, what changed, and when it was last seen.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/watch/dns/a/via/opendns?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-opendns-91d85300
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BgVJbHMfpXHuEFAghCpZX

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-opendns-91d85300
```

Example prompt: Keep an eye on the DNS A record for example.com via OpenDNS — let me know if it changes compared to the last time you checked, and show me what was different and when it was last seen.

## When to prefer this

Choose this endpoint when you need change detection specifically using OpenDNS as the resolver, which may differ from Cloudflare, Google, or other providers due to OpenDNS's filtering or different caching behavior. Ideal for scheduled polling workflows where you want diff-based alerting rather than just a raw DNS lookup. Prefer over raw DNS lookup endpoints when the goal is detecting drift or changes over time rather than a one-time resolution.

## Known failure modes

- Domain not found or NXDOMAIN — returns empty record set with no change signal
- No previous result stored (first call) — changed will be false or null with no before value
- OpenDNS upstream timeout — may return an error or stale data
- Invalid domain format — request may fail or return empty response
- 90-day history expired — comparison unavailable, treated as first call

## How this service works

Change watch for dns a via opendns: 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 from OpenDNS, a boolean indicating whether the record changed since the last call, a diff of which fields changed with before/after values, and the timestamp of when the record was last seen. Previous results are retained for 90 days per domain.

## 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-opendns-91d85300/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)