# extract-tables-as-json-watch

> extract-tables-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 a webpage's tables (as JSON) for changes, returning the current data, a changed flag, diff of changed fields, and last-seen timestamp.

## Facts

- Endpoint: GET https://page.intel.rallylive.ca/watch/page/tables/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-tables-as-json-watch-4085bca6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ogxdFvjRO2tYdH6JjrGX9

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-tables-as-json-watch-4085bca6
```

Example prompt: Keep an eye on the tables at https://example.com/data and let me know if anything has changed since the last time you checked — show me exactly which table cells or rows changed and what the old vs new values were.

## When to prefer this

Choose this endpoint when you need to detect changes in structured tabular data on a webpage over time rather than just extracting tables once. It is ideal for scheduled monitoring workflows where you want to be alerted to any updates, additions, or deletions in table rows or columns. Prefer this over a one-shot table extraction endpoint when change detection and diffing are the primary goals.

## Known failure modes

- URL is unreachable or returns a non-200 status — no table data returned
- Page has no HTML tables — returns empty result with changed false
- First call for a URL has no previous snapshot to compare against — changed may be null or false
- Page blocks automated access (bot protection) — extraction may fail or return incomplete data
- Snapshot older than 90 days is purged — comparison unavailable

## How this service works

Change watch for extract tables 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 tables extracted from the page as JSON, a boolean 'changed' flag indicating if the data differs from the previous call, a list of fields that changed with their before and after values, and a timestamp of when the data was last seen. Previous snapshots are retained for 90 days for comparison.

## 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-tables-as-json-watch-4085bca6/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)