{"uid":"cap_g39wvR-iPixx4zMrsLghz","slug":"tcp-port-check-3966e1d1","name":"TCP Port Check","description":"TCP port check: is a port open on a host? Attempts a real TCP connection (common ports: 21, 22, 25, 80, 443, 465, 587, 993, 3306, 5432, 6379, 8080, 8443...) and reports open/closed with connection latency. Connectivity and firewall verification. $0.01 per check.","url":"https://intel.rallylive.ca/port-check","method":"GET","headers":{},"bodySchema":{"type":"object","$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_XUH5zug9CvLr0C99Hqmk3","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":"Attempts a real TCP connection to a specified host and port, reporting whether the port is open or closed along with connection latency.","exampleAgentPrompt":"Can you check if port 443 is open on api.example.com — I need to know if the HTTPS port is reachable and how fast the connection is?","exampleUseCases":[{"title":"Firewall rule verification after deployment","prompt":"I just updated the firewall rules on my server at 203.0.113.42 — can you confirm that port 8080 is now open and accepting connections?"},{"title":"Database port exposure check","prompt":"Is the PostgreSQL port 5432 on db.mycompany.com accessible from the outside? I want to make sure it's properly blocked."},{"title":"Mail server SMTP port audit","prompt":"Check whether port 587 is open on mail.startupco.io — we're trying to debug why our outbound email isn't going through."}],"resultDescription":"Returns whether the specified TCP port is open or closed on the target host, along with the measured connection latency in milliseconds. Indicates whether a real TCP handshake succeeded or was refused/timed out.","failureModes":["Host not resolvable (DNS failure) — port check cannot proceed","Connection timeout — port may be filtered by firewall rather than explicitly closed","Invalid port number out of range 1-65535","Rate limiting or blocked probe IPs on the target host","Host actively refuses connection — reported as closed"],"whenToPreferThis":"Use this endpoint when you need to verify actual TCP-layer connectivity to a specific port on a host, especially for firewall audits, service health checks, or debugging connectivity issues. Prefer this over HTTP-based health checks when the service may not speak HTTP or when you need raw TCP reachability without application-layer response parsing.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T13:13:36.422Z","isFirstParty":false}