# Kayak.com Downtime Change Watcher

> Kayak.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).

Runs a live uptime check on kayak.com, compares it to the previous result (stored 90 days), and returns whether the status changed, which fields changed, and when it was last seen.

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/kayak-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/kayak-com-downtime-change-watcher-6fb01611
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0gOCyUwOySOD0obk9ebIw

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 kayak-com-downtime-change-watcher-6fb01611
```

Example prompt: Keep an eye on whether kayak.com is down and let me know as soon as its status changes — I want to know if it goes offline or comes back up.

## When to prefer this

Use this endpoint when you need to detect transitions in kayak.com availability rather than just its current status. It is ideal for event-driven alerting workflows where you only want to act when something changes. Prefer it over a simple status-check endpoint when you want before/after field diffs and a 90-day historical comparison window.

## Known failure modes

- No previous check stored — first call has nothing to compare against so 'changed' may default to false or null
- kayak.com is unreachable due to a network issue unrelated to its actual status, causing a false positive
- Stored snapshot is older than 90 days and has expired, losing comparison baseline
- Payment not fulfilled — x402 micropayment of $0.02 USDC not completed, request rejected

## How this service works

Change watch for is kayak 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 kayak.com, a boolean 'changed' flag indicating whether the result differs from the previous call, a list of fields that changed with their before and after values, and the timestamp of when the status was last observed. Results are compared against a stored snapshot 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/kayak-com-downtime-change-watcher-6fb01611/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)