# Purolator.com Down Change Watch

> Purolator.com Down Change Watch is a paid API for AI agents from monitor.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).

Monitors whether purolator.com is down and alerts when the status changes compared to the previous check, returning a changed flag and before/after field diffs.

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/purolator-com?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/purolator-com-down-change-watch-8cd70c95
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9dcSuzkWjXNWBybloIpve

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 purolator-com-down-change-watch-8cd70c95
```

Example prompt: Keep an eye on whether purolator.com is down and let me know as soon as its status changes from what it was last time you checked.

## When to prefer this

Choose this endpoint when you need change-detection semantics — you want to know not just the current status of purolator.com but whether it has changed since your last poll. It is ideal for scheduled monitoring workflows where you only want to act on state transitions (down→up or up→down), not on every check. Prefer it over a plain is-down check when you need diff data (before/after field values) and a 90-day stored comparison baseline.

## Known failure modes

- Purolator.com itself is unreachable due to transient network issues rather than actual downtime — may yield false positives
- No previous check stored (first call or >90 days since last call) — 'changed' comparison not available
- Payment of $0.02 USDC not provided or rejected — request fails with 402
- Endpoint rate limited or overloaded — delayed or error response

## How this service works

Change watch for is purolator com down: runs the check, compares it with the result from your previous call for the same query (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 up/down answer for purolator.com, a boolean 'changed' flag indicating whether the result differs from the previous call (stored up to 90 days), a list of fields that changed with their before and after values, and the timestamp of when the status 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/purolator-com-down-change-watch-8cd70c95/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from monitor.intel.rallylive.ca](https://www.zero.xyz/host/monitor.intel.rallylive.ca/llms.txt)