# is-port-123-open-watch

> is-port-123-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 2026-10-13).

Monitors whether TCP port 123 (NTP) is open on a host, returning the current status, whether it changed since the last check, and before/after field diffs.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/watch/ip/port/123?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-port-123-open-watch-6e0dbac6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fUVcnr7R9svO5XPngrf-g

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability is-port-123-open-watch-6e0dbac6
```

Example prompt: Keep an eye on port 123 (NTP) on my server — check if it's open right now and tell me whether its status has changed since the last time you checked, including what changed and when it was last seen.

## When to prefer this

Use this endpoint when you need to detect state changes in port 123 (NTP) availability over time, not just perform a one-off check. It is best suited for scheduled monitoring workflows, alerting pipelines, or audit trails where knowing whether something changed — and what specifically changed — is more important than just the current status. Prefer the non-watch sibling if you only need the current open/closed result without change detection.

## Known failure modes

- Host unreachable or invalid — connection attempt fails with no status returned
- No previous check stored — first call has no prior result to compare against (changed will be false/null)
- 90-day history expired — prior result purged, diff unavailable
- Timeout on port probe — edge connection to host timed out, open/closed indeterminate
- Payment failure — x402 payment not accepted, request rejected

## How this service works

Change watch for is port 123 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 123 on the specified host, a boolean indicating whether the result changed since the previous call for the same host (retained up to 90 days), a diff of which fields changed with before/after values, and a timestamp of when it was last seen.

## Request schema (JSON Schema)

```json
{
 "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"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/is-port-123-open-watch-6e0dbac6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ip.intel.rallylive.ca](https://www.zero.xyz/host/ip.intel.rallylive.ca/llms.txt)