# sentence-split-watch

> sentence-split-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 URL for changes in its page text when split into sentences, returning a diff of which sentences changed since the last check.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/page/sentences
- 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/sentence-split-watch-09ceac26
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h7zwUeDHmNDA5FZFgtDKj

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 sentence-split-watch-09ceac26
```

Example prompt: Check https://example.com/about for any sentence-level text changes since the last time you looked — tell me if anything changed, which sentences are new or gone, and show me the before-and-after.

## When to prefer this

Use this endpoint when you need sentence-granularity change detection on a web page and want to know exactly which sentences appeared, disappeared, or changed — not just whether the page hash is different. Ideal for scheduled polling workflows where you call on a cadence and need structured before/after diffs stored server-side. Prefer over generic page-hash monitors when the downstream task requires understanding what textual content changed, such as tracking legal documents, news articles, or competitor copy.

## Known failure modes

- URL is unreachable or returns a non-200 status — check will fail or return an error response
- First-time call has no previous result to compare against — changed flag may be null or false with no diff
- Page returns dynamic JavaScript-rendered content that cannot be fetched server-side — sentence extraction may be incomplete
- URL changes redirect destination — comparison may reflect redirect rather than target page
- 90-day retention window exceeded — previous result purged, no diff available

## How this service works

Change watch for sentence split: 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 text split into sentences changes. $0.01 per check.

## Output

Returns the current list of sentences extracted from the page, a boolean indicating whether anything changed since the last call, a detailed field-level diff showing exactly which sentences were added, removed, or modified (with before and after values), and a timestamp of when the page was last seen. Historical 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/sentence-split-watch-09ceac26/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)