{"uid":"cap_5rS7EDn7VCJkRP0tsAM2n","slug":"is-port-23-open-watch-7a469daa","name":"is-port-23-open-watch","description":"Change watch for is port 23 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. $0.02 per check.","url":"https://ip.intel.rallylive.ca/watch/ip/port/23?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_8hn4qipXLLpxU-oe6E1gI","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":"Checks whether TCP port 23 (Telnet) is open on a host and returns whether the result has changed since the last check, with before/after field diffs.","exampleAgentPrompt":"Keep an eye on whether port 23 (Telnet) is open on 203.0.113.45 and let me know if its status has changed since the last time you checked.","exampleUseCases":[{"title":"Alert on unexpected Telnet exposure","prompt":"Watch port 23 on my server at 198.51.100.10 and tell me if it suddenly becomes open — I need to know the moment Telnet is exposed."},{"title":"Security audit change tracking","prompt":"Check whether TCP port 23 is open on 192.0.2.78 and compare it to the last result — has anything changed, and when was it last seen?"},{"title":"Automated Telnet port sweep monitoring","prompt":"Set up a recurring check for port 23 on 203.0.113.99 so I get alerted any time the open/closed status flips, including what changed and the before and after values."}],"resultDescription":"Returns the current open/closed status of port 23 on the target host, a boolean 'changed' flag indicating whether the result differs from the previous call (stored up to 90 days), a list of changed fields with their before and after values, and a timestamp of when the status was last observed.","failureModes":["Host unreachable or invalid IP returns an error or inconclusive port status","No previous result stored (first call) means 'changed' may be null or baseline-only","Results older than 90 days are expired, causing the comparison to reset","Network-level blocking between Cloudflare edge and target may produce false 'closed' results","Invalid host format in query causes a 400-level error"],"whenToPreferThis":"Choose this endpoint when you need to track changes in port 23 (Telnet) availability over time rather than just a one-time check. It is ideal for scheduled monitoring workflows where you want to be alerted only when the open/closed status flips, avoiding noise from repeated identical results. Prefer it over the plain port-23-open check when your agent needs diff-aware logic (before/after values) or when building alerting pipelines for security or infrastructure teams.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-10T18:42:42.639Z","isFirstParty":false,"canonicalSlug":"is-port-23-open-watch-7a469daa"}