# Webpage Text Extractor Change Watch

> Webpage Text Extractor Change 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 readable plain text for changes by comparing each check against the previously stored result, returning change status and field-level diffs.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/page-text
- 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/webpage-text-extractor-change-watch-fe1081a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9Kpfsuxcd_BEC8enwdwK3

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 webpage-text-extractor-change-watch-fe1081a7
```

Example prompt: Keep an eye on https://example.com/pricing for me — check it regularly and let me know whenever the readable text on that page changes from what it was last time.

## When to prefer this

Choose this endpoint when you need to detect changes in the human-readable main body text of a webpage on a recurring basis, and want structured diff output (before/after field values) without building your own snapshot storage. It is ideal for scheduled agent workflows that poll pages periodically and need change-aware responses rather than raw content every time.

## Known failure modes

- URL is unreachable or returns a non-200 status — check may fail or return error
- Page requires JavaScript rendering — static extractor may miss dynamically loaded content
- First call for a URL has no previous snapshot to compare against — changed flag may be null or false by default
- URL content is behind authentication — extractor cannot access protected pages
- 90-day retention window exceeded — no prior snapshot available for comparison

## How this service works

Change watch for webpage text extractor: 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 extract the readable main text of a web page as plain text changes. $0.01 per check.

## Output

Returns the current extracted plain text of the page, a boolean indicating whether the content changed since the last call for the same URL, a list of exactly which fields changed with their before and after values, and a timestamp of when the content was last seen. Results from previous calls 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/webpage-text-extractor-change-watch-fe1081a7/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)