{"uid":"cap_-ghRcu1GTxfm0VSkPx09l","slug":"is-port-139-open-watch-518b7b38","name":"is-port-139-open-watch","description":"Change watch for is port 139 open: runs the check, compares it with the result from your previous call for the same host (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. $0.02 per check.","url":"https://ip.intel.rallylive.ca/watch/ip/port/139?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_6sbV-UbyC1IttYJpM8lXZ","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 whether TCP port 139 (NetBIOS Session Service) is open on a host and returns whether the status has changed since the last check, with before/after diff and timestamp.","exampleAgentPrompt":"Keep an eye on port 139 for me on that server — let me know if it opens or closes compared to the last time you checked it.","exampleUseCases":[{"title":"Detect unexpected NetBIOS exposure","prompt":"Watch port 139 on our production server and tell me if it's changed state since the last check — I want to know immediately if that NetBIOS port ever becomes open."},{"title":"Scheduled SMB attack surface audit","prompt":"Run the port 139 change watch on that IP we flagged last week and tell me whether its status has flipped since the previous scan, including what changed and when it was last seen."},{"title":"Network hardening compliance check","prompt":"Check if port 139 has changed on any of our edge servers — I need to confirm they're still closed and get a before/after diff if anything shifted."}],"resultDescription":"Returns the current open/closed status of port 139, a boolean 'changed' field indicating whether the result differs from the previous call (stored up to 90 days), a list of fields that changed with their before and after values, and a timestamp of when the status was last seen.","failureModes":["No previous result stored (first call for this host) — 'changed' will be false or undefined with no before value","Host unreachable or connection timeout — port may appear closed even if a firewall is blocking the probe","Invalid or non-routable IP address — check will fail or return error","Rate limit or payment failure — $0.02 USDC charge fails and call is rejected","Previous result expired (older than 90 days) — comparison baseline is lost, treated as first call"],"whenToPreferThis":"Choose this endpoint when you need to detect state changes in port 139 (NetBIOS Session Service) over time rather than just a one-time check. It is ideal for scheduled security monitoring workflows, alerting pipelines, or compliance audits where you need to know if and when the port status flipped, with a structured diff. Prefer the non-watch variant if you only need the current open/closed answer without historical comparison.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-12T18:47:23.389Z","isFirstParty":false,"canonicalSlug":"is-port-139-open-watch-518b7b38"}