# Costco.com Downtime Change Watcher

> Costco.com Downtime Change Watcher 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).

Checks if costco.com is currently down, compares the result to the previous check (retained 90 days), and returns what changed and when.

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/costco-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/costco-com-downtime-change-watcher-334ea650
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hSfQhB2vxGODcB8uf2Q3K

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 costco-com-downtime-change-watcher-334ea650
```

Example prompt: Keep an eye on costco.com for me and let me know the moment its status changes — whether it goes down or comes back up — compared to the last time you checked.

## When to prefer this

Use this endpoint when you need change-aware monitoring of costco.com specifically — not just a point-in-time status check. It is ideal for scheduling periodic polls and triggering alerts only when something actually changes, avoiding alert fatigue from repeated identical results. Prefer this over a one-shot 'is-down' check when you want before/after diff data and event-driven workflows.

## Known failure modes

- No previous check stored (first call returns current status with no comparison)
- Costco.com temporarily unreachable due to network issues unrelated to actual downtime
- Stale comparison if previous result is older than 90 days
- Payment failure at $0.02 USDC per call via x402 protocol

## How this service works

Change watch for is costco 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 status of costco.com, a boolean indicating whether the result changed since the previous call, a list of fields that changed with before and after values, and the timestamp of when the status was last seen. Previous results are stored for 90 days per query.

## 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/costco-com-downtime-change-watcher-334ea650/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)