# Reverse DNS via AdGuard Change Watch

> Reverse DNS via AdGuard Change Watch is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).

Monitors reverse DNS (PTR) lookups for an IP address using AdGuard, detecting and reporting changes compared to the previous check.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/watch/ip/ptr/via/adguard?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/reverse-dns-via-adguard-change-watch-6cba82aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iYIL_7hxX2S6AeaO9v1v5

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 reverse-dns-via-adguard-change-watch-6cba82aa
```

Example prompt: Keep an eye on the reverse DNS (PTR record) for IP 203.0.113.45 using AdGuard and let me know if it changes compared to the last time you checked.

## When to prefer this

Choose this endpoint when you need to detect changes in reverse DNS (PTR) records for a specific IP address over time, particularly when using AdGuard as the DNS resolver. Ideal for automated monitoring workflows where you want to be alerted when an IP's hostname association changes, rather than just performing a one-time lookup.

## Known failure modes

- IP address not provided or invalid format — query fails
- No previous result stored (first call for this IP) — 'changed' may be null or false with no before/after diff
- AdGuard DNS lookup fails or times out — error returned
- Result older than 90 days purged — comparison unavailable
- Payment not received — 402 response blocking the check

## How this service works

Change watch for reverse dns via adguard: runs the check, compares it with the result from your previous call for the same ip (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 PTR record result, a boolean indicating whether it changed since the last call, the specific fields that changed with their before and after values, and a timestamp of when the record was last seen. Previous results are retained for 90 days for comparison.

## 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/reverse-dns-via-adguard-change-watch-6cba82aa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ip.intel.rallylive.ca](https://www.zero.xyz/host/ip.intel.rallylive.ca/llms.txt)