{"uid":"cap_so2cCG5sJiOhle5p9PfGV","slug":"is-port-88-open-deeb939b","name":"is-port-88-open","description":"Is TCP port 88 (Kerberos) open on a host? Attempts a connection from Cloudflare's edge and reports open/closed/filtered with the connect time; Cloudflare-fronted hosts are reported as inconclusive because their edge answers for them. Exposure checks for Kerberos without running a scanner. $0.01 per check.","url":"https://ip.intel.rallylive.ca/ip/port/88?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_csfL5LV34qh7VQMpNx0Ic","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether TCP port 88 (Kerberos) is open, closed, or filtered on a given host by attempting a connection from Cloudflare's edge network.","exampleAgentPrompt":"Can you check whether TCP port 88 (Kerberos) is open or closed on auth.example.com — I want to know if it's exposed to the internet without running a local scanner.","exampleUseCases":[{"title":"Kerberos exposure audit for domain controller","prompt":"Check if port 88 is open on our domain controller at dc1.corp.acme.com — I need to know if Kerberos is publicly reachable before our security audit."},{"title":"Pre-deployment firewall verification","prompt":"Before we go live, can you confirm that TCP port 88 is properly firewalled off on 198.51.100.42? It should be closed or filtered, not open."},{"title":"Incident response exposure check","prompt":"We got an alert that a server might be misconfigured — can you quickly check if port 88 is open on suspicious-host.example.net without triggering any intrusion detection?"}],"resultDescription":"Returns the port status (open, closed, or filtered) for TCP port 88 on the target host, along with the TCP connect time in milliseconds. If the host is behind Cloudflare's edge, the result is flagged as inconclusive because Cloudflare's network answers on behalf of the origin.","failureModes":["Host is Cloudflare-fronted — result reported as inconclusive rather than accurate open/closed status","Host is unreachable or DNS does not resolve — connection attempt times out and may return filtered","Firewall rate-limiting may cause intermittent false filtered results","Invalid hostname or IP provided — likely returns an error response","Payment failure ($0.01 USDC) prevents the check from being executed"],"whenToPreferThis":"Choose this endpoint when you need a quick, passive exposure check for Kerberos (TCP port 88) on a specific host without deploying a local network scanner. It is ideal for security audits, pre-deployment firewall verification, or incident response triage where you want an external-perspective check from Cloudflare's edge. Prefer alternatives if the target is known to be Cloudflare-fronted (results will be inconclusive) or if you need a full port-range scan.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:43:02.213Z","isFirstParty":false,"canonicalSlug":"is-port-88-open-deeb939b"}