{"uid":"cap_D2lcB0KULyGebGnbtFESR","slug":"reverse-dns-via-google-change-watch-56a4e696","name":"Reverse DNS via Google Change Watch","description":"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. $0.02 per check.","url":"https://ip.intel.rallylive.ca/watch/ip/ptr/via/google?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_emFFHi-OJSEPohiq4NxjO","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Keep an eye on the reverse DNS record for 8.8.8.8 using Google and tell me if it has changed since last time — I want to know the old and new hostname if it flipped.","exampleUseCases":[{"title":"Alert on ISP reassignment of IP block","prompt":"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."},{"title":"Security monitoring for suspicious host rename","prompt":"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."},{"title":"Automated infrastructure drift detection","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:42:25.516Z","isFirstParty":false,"canonicalSlug":"reverse-dns-via-google-change-watch-56a4e696"}