# is-port-88-open-watch

> is-port-88-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 2026-10-11).

Monitors whether TCP port 88 is open on a host and returns whether the status has changed since your last check, with before/after field diffs.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/watch/ip/port/88?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-port-88-open-watch-4222b167
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QhRfE0dwKuTbGeGgYVb2h

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-88-open-watch-4222b167
```

Example prompt: Keep an eye on whether port 88 is open on my server at 203.0.113.45 — let me know if its status has changed since the last time you checked.

## When to prefer this

Choose this endpoint when you need to detect state changes on port 88 (commonly used for Kerberos authentication) rather than just knowing the current state. It is ideal for scheduled monitoring workflows where you want to be alerted only when something changes, reducing noise compared to plain port-open checks. Prefer it over a simple port-open check when you need historical before/after context and change timestamps.

## Known failure modes

- Host unreachable or invalid hostname returns an error or indeterminate port status
- No previous check stored (first call) means 'changed' may be undefined or false by default
- Firewall blocking the probe may return closed even if port is actually open
- Stale comparison if previous result is older than 90 days and has been expired
- Payment failure results in no check being performed

## How this service works

Change watch for is port 88 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 88 on the target host, a boolean indicating whether the status changed since the last call, a diff of fields that changed with before and after values, and the timestamp when the state was last observed. Previous results are retained for 90 days for comparison.

## 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-88-open-watch-4222b167/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)