{"uid":"cap_uzUWJCRoxgtn3P00R3mEx","slug":"reverse-dns-via-mullvad-change-watch-b720b371","name":"Reverse DNS via Mullvad Change Watch","description":"Change watch for reverse dns via mullvad: 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. $0.02 per check.","url":"https://ip.intel.rallylive.ca/watch/ip/ptr/via/mullvad?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_71HLDHkJ2UkktH7ygQKuH","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 Mullvad for a given IP, detecting and reporting changes compared to the previous check result stored up to 90 days.","exampleAgentPrompt":"Keep an eye on the reverse DNS for IP 185.213.154.10 via Mullvad and let me know if its PTR record changes from what it was last time you checked.","exampleUseCases":[{"title":"Security alert on suspicious IP","prompt":"Watch the reverse DNS for 91.108.4.1 via Mullvad and tell me if its PTR record has changed since the last check — I want to know immediately if something flips."},{"title":"Track CDN or hosting provider changes","prompt":"Monitor the reverse DNS for 104.21.44.55 using Mullvad and alert me if the hostname it resolves to changes, so I can catch any hosting provider switches."},{"title":"Infrastructure audit for known server","prompt":"Check whether the reverse DNS on 198.51.100.23 via Mullvad has changed since you last looked it up, and show me the before and after values if anything is different."}],"resultDescription":"Returns the current PTR record result, a boolean 'changed' flag indicating whether it differs from the previous call for that IP, a list of fields that changed with their before and after values, and the timestamp of when the record was last seen. Previous results are retained for 90 days.","failureModes":["IP not previously checked — no baseline for comparison, changed flag may be null or first-run","Invalid or non-routable IP address provided — lookup fails with an error","Mullvad DNS resolver unavailable — check fails to complete","No PTR record exists for the IP — returns empty result with no hostname","Payment failure via x402 — request rejected before execution"],"whenToPreferThis":"Choose this endpoint when you need to detect changes in reverse DNS specifically as resolved through Mullvad's network, which may reveal different PTR records than standard resolvers due to routing differences. Ideal for scheduled monitoring workflows where you want to be alerted on PTR record drift for IPs you're tracking over time, particularly in security, fraud detection, or infrastructure change auditing contexts.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:42:55.202Z","isFirstParty":false,"canonicalSlug":"reverse-dns-via-mullvad-change-watch-b720b371"}