# address-extract-watch

> address-extract-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 web page for changes in postal address candidates, returning changed/unchanged status with before/after field diffs since last check

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/site/addresses
- 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/address-extract-watch-3dce1c23
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-ubBPyD6JAl_xWVXgozoe

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 address-extract-watch-3dce1c23
```

Example prompt: Check this page for any changes to postal addresses since the last time you looked — tell me if anything changed, exactly which address fields are different, and what the before and after values are: https://example.com/contact

## When to prefer this

Choose this endpoint when you need to detect changes in postal addresses on a specific web page over time, rather than a one-shot extraction. It is ideal for scheduled agent workflows that poll vendor, partner, or regulatory pages and need field-level diff awareness (e.g., street changed but ZIP stayed the same). Prefer it over a plain address-extract call when historical comparison and change alerting matter, and over a general web-change monitor when you specifically care about structured address fields rather than raw HTML diffs.

## Known failure modes

- URL is unreachable or returns non-200 — extraction cannot proceed
- No postal address candidates found on the page — empty result set returned
- First-time call has no prior result to compare against — changed flag may be null or baseline set
- Page content is behind JavaScript rendering and addresses are not in static HTML — extraction may miss dynamic content
- 90-day history window expired — previous result no longer available, comparison resets

## How this service works

Change watch for address 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 postal address candidates from a page changes. $0.01 per check.

## Output

Returns the currently extracted postal address candidates from the page, a boolean indicating whether the address data changed since the previous call (kept up to 90 days), an itemized list of which specific address fields changed with their before and after values, and the timestamp of when the address data was last observed.

## 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/address-extract-watch-3dce1c23/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)