# extract-aside-as-json-watch

> extract-aside-as-json-watch is a paid API for AI agents from page.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-20).

Monitors the aside elements of a web page for changes, returning the current extracted JSON, a changed flag, field-level before/after diffs, and the last-seen timestamp.

## Facts

- Endpoint: GET https://page.intel.rallylive.ca/watch/page/aside/json?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/extract-aside-as-json-watch-28f461ec
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_r9OOv7uAkXqADHZ5MRQ52

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 extract-aside-as-json-watch-28f461ec
```

Example prompt: Watch the aside section of https://example.com/product-page for me — run the check now and tell me if the JSON content has changed since my last call, including what specifically changed.

## When to prefer this

Choose this endpoint when you need to detect changes specifically in a page's aside/sidebar HTML elements and want structured JSON diffs with before/after field values and a 90-day comparison history. Prefer it over generic page-diff tools when you need per-field granularity on aside content, and over full-page monitors when you only care about sidebar data.

## Known failure modes

- Target URL is unreachable or returns a non-200 status, resulting in an error response
- Page has no aside elements, returning an empty result set
- First-time call has no prior snapshot to compare against, so 'changed' defaults to false or null
- Snapshot older than 90 days has expired, losing the comparison baseline
- Rate limiting or payment failure (x402) blocks the check

## How this service works

Change watch for extract aside as json: runs the check, compares it with the result from your previous call for the same url (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 aside elements as a JSON object, a boolean 'changed' field indicating whether content differs from the previous call, a diff of changed fields with before and after values, and a timestamp of when the aside content was last seen. Previous results are 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/extract-aside-as-json-watch-28f461ec/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from page.intel.rallylive.ca](https://www.zero.xyz/host/page.intel.rallylive.ca/llms.txt)