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is-port-88-open
x402
is-port-88-open is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Checks whether TCP port 88 (Kerberos) is open, closed, or filtered on a given host by attempting a connection from Cloudflare's edge network.
Price / call$0.01
Success—
StatusUnknown
How this service works
Is TCP port 88 (Kerberos) open on a host? Attempts a connection from Cloudflare's edge and reports open/closed/filtered with the connect time; Cloudflare-fronted hosts are reported as inconclusive because their edge answers for them. Exposure checks for Kerberos without running a scanner. $0.01 per check.
Output
Returns the port status (open, closed, or filtered) for TCP port 88 on the target host, along with the TCP connect time in milliseconds. If the host is behind Cloudflare's edge, the result is flagged as inconclusive because Cloudflare's network answers on behalf of the origin.
Example use cases
Kerberos exposure audit for domain controller
“Check if port 88 is open on our domain controller at dc1.corp.acme.com — I need to know if Kerberos is publicly reachable before our security audit.”
Pre-deployment firewall verification
“Before we go live, can you confirm that TCP port 88 is properly firewalled off on 198.51.100.42? It should be closed or filtered, not open.”
Incident response exposure check
“We got an alert that a server might be misconfigured — can you quickly check if port 88 is open on suspicious-host.example.net without triggering any intrusion detection?”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/ip/port/88?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a quick, passive exposure check for Kerberos (TCP port 88) on a specific host without deploying a local network scanner. It is ideal for security audits, pre-deployment firewall verification, or incident response triage where you want an external-perspective check from Cloudflare's edge. Prefer alternatives if the target is known to be Cloudflare-fronted (results will be inconclusive) or if you need a full port-range scan.
Side effects
- Host is Cloudflare-fronted — result reported as inconclusive rather than accurate open/closed status
- Host is unreachable or DNS does not resolve — connection attempt times out and may return filtered
- Firewall rate-limiting may cause intermittent false filtered results
- Invalid hostname or IP provided — likely returns an error response
- Payment failure ($0.01 USDC) prevents the check from being executed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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