# Yelp.com Downtime Change Watch

> Yelp.com Downtime Change Watch is a paid API for AI agents from monitor.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-02).

Monitors whether yelp.com is down, returning the current status along with a changed flag and before/after field diffs compared to your last call.

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/yelp-com?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/yelp-com-downtime-change-watch-ca02cb68
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_17MBF_7sQxRcAmpS3c8s4

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 yelp-com-downtime-change-watch-ca02cb68
```

Example prompt: Check if yelp.com is down right now and let me know if anything has changed since the last time we checked — including what specifically changed and when it was last seen online.

## When to prefer this

Use this endpoint when you need to detect changes in yelp.com's availability over time rather than just a one-time status check. It is ideal for scheduled polling workflows where you want to be alerted only when something has changed, avoiding redundant notifications. Choose it over generic uptime tools when you want structured before/after diffs with timestamps, specifically for yelp.com.

## Known failure modes

- No previous check stored (first call returns no diff data)
- yelp.com may be reachable from the monitor but not from the user's region (false negative)
- Stored comparison data expires after 90 days, resetting diff history
- Network issues between monitor and yelp.com may cause false positives
- Rate or payment failures if USDC balance is insufficient

## How this service works

Change watch for is yelp com down: runs the check, compares it with the result from your previous call for the same query (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.

## Output

Returns the current up/down status of yelp.com, a boolean 'changed' flag indicating whether the result differs from the previous call (stored up to 90 days), a list of fields that changed with their before and after values, and the timestamp of when the status 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/yelp-com-downtime-change-watch-ca02cb68/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from monitor.intel.rallylive.ca](https://www.zero.xyz/host/monitor.intel.rallylive.ca/llms.txt)