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is-port-23-open-watch
x402
is-port-23-open-watch is a paid API for AI agents from ip.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-10).
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.
Price / call$0.02
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Alert on unexpected Telnet exposure
“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.”
Security audit change tracking
“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?”
Automated Telnet port sweep monitoring
“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.”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/watch/ip/port/23?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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