# page-weight-watch

> page-weight-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).

Monitors a webpage's weight and resource inventory over time, returning the current result, a changed flag, and field-level before/after diffs compared to the previous check

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/site/weight
- 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/page-weight-watch-67968d68
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-NlIIgrUVHLgYWPxPfeyx

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 page-weight-watch-67968d68
```

Example prompt: Keep an eye on https://example.com for me — check its page weight and resource inventory now and tell me what changed compared to the last time you checked, including exactly which fields are different and their before/after values.

## When to prefer this

Choose this endpoint when you need automated, stateful change detection for page weight and resource inventory specifically — it maintains a 90-day history server-side so you don't need to store snapshots yourself, and it returns structured field-level diffs rather than just a raw snapshot. Ideal for scheduling recurring checks to catch performance regressions, unexpected asset additions, or bloat creep on production pages.

## Known failure modes

- URL is unreachable or returns non-200 status — check may fail or return an error
- First-time call for a URL has no previous snapshot to compare against, so 'changed' will be false or undefined
- Page behind authentication wall may not be accessible
- 90-day retention window exceeded — prior snapshot no longer available for comparison
- Malformed or unsupported URL format rejected

## How this service works

Change watch for page weight: 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 page weight and resource inventory from the html changes. $0.01 per check.

## Output

Returns the current page weight and resource inventory data, a boolean 'changed' flag indicating whether anything differs from the previous call for the same URL (retained up to 90 days), an itemized list of which specific fields changed with before/after values, and a timestamp of when the page 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/page-weight-watch-67968d68/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)