# is-website-up-watch

> is-website-up-watch is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Change-watch for website uptime checks: runs an HTTP reachability check on a URL and compares the result to the previous call, returning what changed and when.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/is-it-up
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/is-website-up-watch-c9b7e1cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qZ22S9V8llLTESx38dDXG

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-website-up-watch-c9b7e1cb
```

Example prompt: Check if https://shop.example.com is up right now and tell me if anything has changed since you last checked — whether the status flipped or the response time shifted.

## When to prefer this

Choose this endpoint when you need to detect *changes* in website availability rather than just a one-time status check — it's ideal for scheduled polling workflows where you only want to act when something transitions (e.g. up→down or down→up). Prefer it over a plain uptime check when you need before/after diffs and a persistent 90-day comparison history.

## Known failure modes

- Target URL is unreachable or returns an error — endpoint still records the down state and compares it
- No previous result exists for the URL — 'changed' field may be null or indicate first-run
- URL not provided or malformed — request fails with a validation error
- Rate limiting or network timeouts on the target server may cause false negatives

## How this service works

Change watch for is website up: runs the check and compares it with the result from your previous call for the same url (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when is this website up? checks if a url is online right now and answers up/down with the http status code, response time in  changes. $0.01 per check.

## Output

Returns the current up/down status, HTTP status code, response time, a 'changed' boolean, a list of exactly which fields changed with their before and after values, and the timestamp of when the state was last seen. Historical comparison data 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-website-up-watch-c9b7e1cb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)