# WHOIS Lookup Change Watch

> WHOIS Lookup Change Watch is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Runs a WHOIS/RDAP domain registration lookup and compares it against the previous result (stored 90 days) to detect and report exactly which fields changed, with before/after values.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/whois
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/whois-lookup-change-watch-745ad5b6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Fa7BBh_OJJhZ1P5gznzwM

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 whois-lookup-change-watch-745ad5b6
```

Example prompt: Keep an eye on the WHOIS registration data for example.com and let me know the moment anything changes — like the registrar, nameservers, expiry date, or owner — showing me exactly what was before and what it is now.

## When to prefer this

Choose this endpoint when you need to detect changes in domain registration data over time rather than just performing a one-off WHOIS lookup. It is ideal for scheduled monitoring workflows where you want automatic diffing with before/after field-level comparison rather than manually comparing two separate lookup results. It stores state server-side for 90 days, eliminating the need to manage your own snapshot storage. Prefer it over a plain WHOIS lookup endpoint when the goal is change detection, alerting, or audit logging of domain registration history.

## Known failure modes

- Domain not found or unregistered — WHOIS lookup returns empty or NXDOMAIN response
- No previous result stored — first call for a domain returns current data with changed=false and no diff
- Previous result expired (older than 90 days) — treated as first call, no comparison available
- RDAP/WHOIS service unavailability for the queried TLD — upstream timeout or error returned
- Invalid domain format supplied — request fails with a validation error
- Rate limiting or upstream throttling by the WHOIS registry — partial or delayed results

## How this service works

Change watch for whois lookup: runs the check and compares it with the result from your previous call for the same domain (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when whois / rdap domain registration lookup changes. $0.01 per check.

## Output

Returns the current full WHOIS/RDAP lookup result for the domain, a boolean 'changed' flag indicating whether anything differs from the previous call, a detailed list of which specific fields changed with their before and after values, and the timestamp of when the previous state was last seen. The previous result is 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/whois-lookup-change-watch-745ad5b6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)