# HubVibe Page Change Monitor Check

> HubVibe Page Change Monitor Check is a paid API for AI agents from hubvibe-io.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-10-02).

Re-fetches a previously snapshotted URL and returns whether the page changed along with a summary of what changed.

## Facts

- Endpoint: POST https://hubvibe-io.com/work/monitor/check?utm_source=zero.xyz
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hubvibe-page-change-monitor-check-11f99831
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JRUt28g8CMxXN_2GVZD3v

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 hubvibe-page-change-monitor-check-11f99831 -d '<json body>'
```

Example prompt: Check if https://example.com/pricing has changed since the last snapshot was taken and summarize what's different.

## When to prefer this

Use this endpoint when you have already called the snapshot endpoint for a URL and want to detect whether that page has changed. Ideal for recurring monitoring tasks, price watching, content tracking, or detecting edits to web pages. Prefer this over general-purpose web fetchers when change detection and diff summarization are the primary goal.

## Known failure modes

- URL is unreachable or returns non-200 status — endpoint may return an error or indicate the page could not be fetched
- No prior snapshot exists for the given URL — check will fail or return an error indicating snapshot must be taken first
- URL returns a dynamically rendered page that differs each load due to ads or timestamps — may produce false positives
- Rate limiting or bot-blocking by the target site — fetch may fail or return incomplete content

## How this service works

Website change detection, step two: re-fetch a page saved with monitor.snapshot and get whether it changed, how old the baseline is, and a written summary of what changed. Use it to track price changes, terms updates, new job posts or competitor moves. Input: url; optional language.

## Output

Returns a boolean indicating whether the page changed since the last snapshot, plus a human-readable summary describing what specifically changed (e.g. text additions, removals, price differences, new elements).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string"
  },
  "language": {
   "type": "string",
   "pattern": "^[A-Za-z]{2,3}(-[A-Za-z0-9]{2,8})*$",
   "maxLength": 35
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "url": "https://example.com",
   "model": "gemini-2.5-flash",
   "title": "Example Domain",
   "changed": true,
   "change_summary": "The pricing section now lists a $0.15 bundle; the headline is unchanged.",
   "baseline_age_seconds": 86400
  },
  "status": "ok",
  "worker": "monitor.check",
  "price_usd": 0.5,
  "provenance": {
   "steps": [
    {
     "ms": 312,
     "ok": true,
     "step": "quote",
     "reason": "provider_timeout",
     "provider": "coinbase-advanced-trade-public"
    }
   ],
   "attempts": 1,
   "elapsed_ms": 340,
   "providers_used": [
    "coinbase-advanced-trade-public"
   ]
  },
  "receipt_id": "rcpt_9f1c2b3a4d5e6f70",
  "attribution": [
   {
    "url": "https://translate.google.com",
    "text": "Translated by Google"
   }
  ],
  "receipt_url": "/work/receipts/rcpt_9f1c2b3a4d5e6f70"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hubvibe-page-change-monitor-check-11f99831/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from hubvibe-io.com](https://www.zero.xyz/host/hubvibe-io.com/llms.txt)