# Site Navigation Extract Change Watch

> Site Navigation 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 webpage's navigation structure for changes, returning current nav extraction plus a diff of what changed since the last check.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/page/nav
- 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/site-navigation-extract-change-watch-e39df016
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wKTBpzjfttRte5wEQ_DAT

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 site-navigation-extract-change-watch-e39df016
```

Example prompt: Keep an eye on https://example.com and let me know whenever its site navigation changes — tell me exactly which nav links or menu items were added, removed, or updated compared to last time you checked.

## When to prefer this

Choose this endpoint when you need to track changes to a website's navigation structure over time rather than just extracting it once. It is ideal for scheduled monitoring workflows where you want to detect when nav menus are added, removed, or rearranged without managing your own state storage. Prefer it over a one-shot extraction endpoint whenever change detection with before/after diffing is the goal.

## Known failure modes

- URL is unreachable or returns a non-200 status — check will fail to extract navigation
- No prior result exists for the URL — first call will return changed: false with no diff
- URL navigation extraction returns empty or unparseable nav structure — result may be blank
- Rate limiting or network timeouts on the target site — extraction may be incomplete
- 90-day retention window exceeded — previous result purged, diff unavailable

## How this service works

Change watch for site navigation 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 site navigation extraction changes. $0.01 per check.

## Output

Returns the current site navigation extraction result, a boolean indicating whether anything changed since the previous call for the same URL, a detailed diff showing exactly which fields changed with before and after values, and a timestamp of 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/site-navigation-extract-change-watch-e39df016/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)