# Analytics ID Extract Change Watch

> Analytics ID Extract 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 website's analytics and pixel IDs for changes by comparing the current extraction result against a stored previous result, returning a diff with before/after values.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/site/analytics-ids
- 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/analytics-id-extract-change-watch-fe137703
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vcpXcmkzwGDP-b4Z3qn6n

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 analytics-id-extract-change-watch-fe137703
```

Example prompt: Check intel.rallylive.ca's analytics ID watcher for https://example.com and tell me if any of their tracking or pixel IDs have changed since the last time you checked — show me exactly which fields changed and what the before and after values were.

## When to prefer this

Use this endpoint when you need scheduled, diff-aware monitoring of analytics and tracking pixel IDs on a specific URL, and want to know not just the current state but exactly what changed compared to the previous check. It is preferable over a plain analytics extractor when your goal is change detection over time rather than a one-off lookup, and when you need field-level before/after audit trails for compliance, competitive intelligence, or QA workflows.

## Known failure modes

- URL unreachable or returns non-200 status — may return error or empty extraction
- No previous result stored (first call) — 'changed' will be false or undefined with no diff
- Target site blocks crawlers — extraction may be incomplete or fail
- Results older than 90 days are purged — comparison resets as if first call
- Rate limiting or payment failure — call rejected before check runs

## How this service works

Change watch for analytics id extract: 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 analytics and pixel id extractor changes. $0.01 per check.

## Output

Returns the current extracted analytics and pixel IDs for the target URL, a boolean 'changed' flag indicating whether anything differs from the previous call, a field-level diff listing exactly which analytics fields changed along with their before and after values, and a timestamp for when the previous result 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/analytics-id-extract-change-watch-fe137703/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)