{"uid":"cap_fUVcnr7R9svO5XPngrf-g","slug":"is-port-123-open-watch-6e0dbac6","name":"is-port-123-open-watch","description":"Change watch for is port 123 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. $0.02 per check.","url":"https://ip.intel.rallylive.ca/watch/ip/port/123?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_Y4gAKVqumaTg_bFGTKKTi","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 123 (NTP) is open on a host, returning the current status, whether it changed since the last check, and before/after field diffs.","exampleAgentPrompt":"Keep an eye on port 123 (NTP) on my server — check if it's open right now and tell me whether its status has changed since the last time you checked, including what changed and when it was last seen.","exampleUseCases":[{"title":"NTP server reachability alerting","prompt":"Watch port 123 on ntp.example.com and let me know if its open/closed status has changed since my last check — I need to know the moment my NTP server goes unreachable."},{"title":"Post-maintenance port change verification","prompt":"After our network maintenance window, check whether port 123 on 203.0.113.10 is now open and whether its state has changed compared to the previous check — show me what changed and when."},{"title":"Scheduled NTP port drift detection","prompt":"Run a change watch on port 123 for host 198.51.100.5 — tell me if it's currently open, whether that's different from before, and give me the before/after details so I can track drift over time."}],"resultDescription":"Returns the current open/closed status of port 123 on the specified host, a boolean indicating whether the result changed since the previous call for the same host (retained up to 90 days), a diff of which fields changed with before/after values, and a timestamp of when it was last seen.","failureModes":["Host unreachable or invalid — connection attempt fails with no status returned","No previous check stored — first call has no prior result to compare against (changed will be false/null)","90-day history expired — prior result purged, diff unavailable","Timeout on port probe — edge connection to host timed out, open/closed indeterminate","Payment failure — x402 payment not accepted, request rejected"],"whenToPreferThis":"Use this endpoint when you need to detect state changes in port 123 (NTP) availability over time, not just perform a one-off check. It is best suited for scheduled monitoring workflows, alerting pipelines, or audit trails where knowing whether something changed — and what specifically changed — is more important than just the current status. Prefer the non-watch sibling if you only need the current open/closed result without change detection.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T00:41:32.559Z","isFirstParty":false,"canonicalSlug":"is-port-123-open-watch-6e0dbac6"}