# is-port-636-open-watch

> is-port-636-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 TCP port 636 (LDAPS) on a host for open/closed state changes, returning the current result and a diff against the previous check stored for 90 days.

## Facts

- Endpoint: GET https://ip.intel.rallylive.ca/watch/ip/port/636?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-636-open-watch-0050fc54
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DpkkJJrtXFLpuLq25AjeX

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-636-open-watch-0050fc54
```

Example prompt: Keep an eye on port 636 on ldap.mycompany.com — let me know if its open or closed state ever changes compared to the last time you checked.

## When to prefer this

Use this endpoint when you need to detect state changes on TCP port 636 (LDAPS) over time rather than just querying the current status. It is ideal for polling-based alerting workflows, compliance drift detection, or any scenario where you need a before/after comparison rather than a one-shot open/closed answer. Prefer over a plain port-check endpoint when historical comparison and change signaling are required.

## Known failure modes

- Host unreachable or DNS resolution failure — returns an error with no port status
- No previous check stored (first call for this host) — 'changed' may be null or absent; no diff available
- Host rate-limited or firewalled against the probe source — may report port closed even if open
- Payment not processed — request rejected before check is run
- Stale baseline if last check was over 90 days ago — stored result expires and diff cannot be computed

## How this service works

Change watch for is port 636 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 state of TCP port 636 on the target host, a boolean 'changed' flag indicating whether the state differs from the previous call, an object listing which fields changed with their before and after values, and a timestamp of when the status was last observed. Previous result is retained for 90 days.

## 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-636-open-watch-0050fc54/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)