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Reverse DNS via Google Change Watch
x402
Reverse DNS via Google 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 record) lookups via Google for a given IP, returning the current result, whether it changed, and a before/after diff compared to the previous call.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for reverse dns via google: 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 hostname resolved via Google DNS, a boolean 'changed' flag indicating if the result differs from the previous call for that IP (stored up to 90 days), a diff of fields that changed including before and after values, and the timestamp of when the IP was last seen.
Example use cases
Alert on ISP reassignment of IP block
“Watch the reverse DNS for 203.0.113.45 via Google and let me know if the PTR record changes — I suspect this IP block is being reassigned to a different ISP.”
Security monitoring for suspicious host rename
“Check if the reverse DNS hostname for 198.51.100.12 has changed since you last looked — flag it immediately if it has, and show me what it was before and what it is now.”
Automated infrastructure drift detection
“Poll the reverse DNS of our server at 192.0.2.88 using Google and alert me any time the PTR record changes so I can catch unexpected infrastructure changes.”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/watch/ip/ptr/via/google?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to detect changes in reverse DNS (PTR records) for a specific IP over time, especially for scheduled polling or alerting workflows. It is distinct from a one-off PTR lookup because it stores prior state and surfaces diffs automatically. Prefer it for security monitoring, ISP/IP ownership tracking, or infrastructure drift detection where knowing 'did this change?' matters more than just knowing the current value.
Side effects
- IP has no PTR record — returns empty or null hostname
- First call for an IP returns no comparison baseline (no prior stored result)
- Stored result has expired (older than 90 days) — treated as first call
- Google DNS unavailable — lookup fails with error
- Invalid or malformed IP address input — request rejected
- Payment failure prevents check from being executed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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