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TCP Port Check
x402
TCP Port Check is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Attempts a real TCP connection to a specified host and port, reporting whether the port is open or closed along with connection latency.
Price / call$0.01
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Firewall rule verification after deployment
“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?”
Database port exposure check
“Is the PostgreSQL port 5432 on db.mycompany.com accessible from the outside? I want to make sure it's properly blocked.”
Mail server SMTP port audit
“Check whether port 587 is open on mail.startupco.io — we're trying to debug why our outbound email isn't going through.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/port-checkWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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