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Reverse DNS Lookup Change Watch
x402
Reverse DNS 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).
Monitors reverse DNS (PTR) records for a given IP address and alerts when they change, comparing current results against a stored baseline from up to 90 days ago.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for reverse dns lookup: runs the check and compares it with the result from your previous call for the same ip (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 reverse dns changes. $0.01 per check.
Output
Returns the current reverse DNS (PTR) lookup result for the IP, a boolean indicating whether it has changed since the last call, a detailed diff of exactly which fields changed with before and after values, and a timestamp of when the record was last seen. The baseline is retained for up to 90 days.
Example use cases
Server migration PTR record tracking
“Watch the reverse DNS for 198.51.100.10 and tell me if the PTR record has changed — I need to know the moment it flips after our server migration.”
Security alert on suspicious IP hostname change
“Monitor reverse DNS for 192.0.2.88 on a schedule and alert me if the hostname it resolves to changes — we want to catch any suspicious reassignment.”
ISP PTR record change detection
“Check whether the reverse DNS for 203.0.113.5 has changed compared to your last recorded result, and show me exactly what changed with before and after values.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/watch/dns/reverseWhen to prefer
Choose this endpoint when you need to detect changes in reverse DNS (PTR) records for a specific IP address over time, rather than performing a one-off lookup. It is ideal for scheduled agent workflows that need to be notified of infrastructure changes, security anomalies, or ISP reassignments without maintaining your own state — the service stores the baseline for 90 days. Prefer this over a raw reverse DNS lookup when change detection and diffing are the primary goal.
Side effects
- IP address not provided or malformed — returns validation error
- No previous baseline exists yet (first call) — returns current result with changed=false or no diff
- IP has no PTR record — returns empty or NXDOMAIN result
- Baseline older than 90 days has been purged — no comparison available
- Network error reaching DNS servers — returns upstream failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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