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is-port-137-open-watch
x402
is-port-137-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).
Monitors whether TCP port 137 (NetBIOS Name Service) is open on a host, comparing current results against a previous check to detect changes.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for is port 137 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 137 on the target host, a boolean 'changed' flag indicating whether the result differs from the previous call (stored for 90 days), an object listing which fields changed with before and after values, and a timestamp of when the status was last observed.
Example use cases
NetBIOS exposure alert on server
“Watch port 137 on my server at 203.0.113.10 and tell me if it changes state — I need to know immediately if that NetBIOS port ever opens up unexpectedly.”
Security audit for firewall changes
“Check if port 137 on 198.51.100.5 has changed since the last scan — I just updated the firewall rules and want to confirm the NetBIOS port is now closed.”
Scheduled infrastructure health check
“Every time you check, compare whether port 137 on host mail.example.com has flipped open or closed since the previous check, and show me what changed and when it was last seen.”
Technical details
Endpoint
GEThttps://ip.intel.rallylive.ca/watch/ip/port/137?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to detect state transitions on port 137 specifically rather than just checking its current status in isolation. It is ideal for scheduled monitoring workflows where you want to be alerted only when something changes, avoiding noise from repeated identical results. Prefer this over a one-shot port check when you need before/after change history and a 'changed' flag to trigger downstream automation.
Side effects
- Host unreachable — connection attempt times out, port reported as closed or error
- Invalid host/IP input — returns an error or empty result
- No previous check stored — first call has no comparison baseline so 'changed' may be indeterminate
- Rate limiting or payment failure — $0.02 USDC charge fails, call is rejected
- Port 137 filtered by firewall — may falsely report as closed when it is actually firewalled
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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