{"uid":"cap_u5b1a0uS_a9h1YoIy7GDw","slug":"is-port-110-open-47ba155d","name":"is-port-110-open","description":"Is TCP port 110 (POP3) 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 POP3 without running a scanner. $0.01 per check.","url":"https://ip.intel.rallylive.ca/ip/port/110?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_wEp9HF6u7-Jhg8a3c5X8-","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 110 (POP3) is open, closed, or filtered on a given host by attempting a connection from Cloudflare's edge network.","exampleAgentPrompt":"Can you check if TCP port 110 (POP3) is open or closed on mail.example.com — I want to know if POP3 is exposed without running a port scanner?","exampleUseCases":[{"title":"Mail server POP3 exposure audit","prompt":"Check if port 110 is open on mail.mycompany.com — I need to know if POP3 is publicly exposed on our mail server."},{"title":"Security hardening verification","prompt":"After I updated the firewall rules, can you verify that TCP port 110 is now closed on 203.0.113.45? I want to confirm POP3 is no longer reachable."},{"title":"Third-party mail host check","prompt":"Is POP3 accessible on the mail server at smtp.vendorhost.net? Check if port 110 is open so I know whether they support POP3 connections."}],"resultDescription":"Returns the status of TCP port 110 on the target host: open, closed, or filtered, along with the connection time in milliseconds. If the host is Cloudflare-fronted, the result is marked inconclusive because Cloudflare's edge intercepts the connection.","failureModes":["Cloudflare-fronted hosts return inconclusive rather than true host status","Invalid or unresolvable hostname returns an error","Network timeouts may cause port to be reported as filtered rather than closed","Rate limiting if many checks are made rapidly"],"whenToPreferThis":"Use this endpoint when you need a lightweight, no-scanner check of POP3 (port 110) exposure on a specific host or IP from an external Cloudflare edge vantage point. Prefer it over general port scanners when you want a quick, pay-per-use, agent-friendly check without standing up infrastructure. Note that Cloudflare-fronted hosts will yield inconclusive results.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:47:16.573Z","isFirstParty":false,"canonicalSlug":"is-port-110-open-47ba155d"}