# Broken Link Check Change Watch

> Broken Link Check 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 URL's broken link check results over time, returning the current status, whether anything changed since the last call, and exactly which fields changed with before/after values.

## Facts

- Endpoint: GET https://intel.rallylive.ca/watch/site/broken-links
- 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/broken-link-check-change-watch-1b84db0e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wBLhOa3omOxvUPeDEQAVK

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 broken-link-check-change-watch-1b84db0e
```

Example prompt: Check if the broken link status has changed for https://example.com since the last time you checked, and tell me exactly which links changed and what they changed from and to.

## When to prefer this

Choose this endpoint when you want to be alerted to changes in broken link status over time rather than just getting a one-off snapshot. It is ideal for scheduled monitoring pipelines, CI/CD post-deploy checks, or agent workflows that need to react only when something actually changes. Prefer this over a plain broken-link-check endpoint when diffing and change detection matter.

## Known failure modes

- URL unreachable or invalid — check may fail or return error state
- No previous result stored (first call for this URL) — changed field will be false or indeterminate
- Results older than 90 days are discarded — baseline lost, treated as first call
- Rate limits or payment failures — call rejected
- Transient network errors causing incomplete link scan

## How this service works

Change watch for broken link check: 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 broken link check changes. $0.01 per check.

## Output

Returns the current broken link check result for the given URL, a boolean indicating whether anything changed since the previous call (stored for up to 90 days), a field-level diff showing exactly which fields changed with their before and after values, and a timestamp of when the result was last seen.

## 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/broken-link-check-change-watch-1b84db0e/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)