# Perplexity AI Uptime Change Watch

> Perplexity AI Uptime 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 perplexity.ai is down and returns a change-diffed result comparing the current check to the previous one, indicating what changed and when.

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/perplexity-ai?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/perplexity-ai-uptime-change-watch-2066e293
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ooduPe3YgU8_gV7g7Z5sT

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 perplexity-ai-uptime-change-watch-2066e293
```

Example prompt: Keep an eye on whether Perplexity AI is down and let me know as soon as its status changes from what it was last time you checked.

## When to prefer this

Use this endpoint when you need change-aware monitoring of Perplexity AI availability — specifically when you want to know *what* changed and *when*, not just the current status. Prefer this over a simple is-down check when building alert pipelines or scheduled polling workflows where acting on state transitions (up→down or down→up) matters more than the raw current status.

## Known failure modes

- No previous result stored (first call returns changed=false or baseline only)
- Perplexity AI check itself times out or is unreachable from monitoring edge
- Stored result expired (older than 90 days) causing a fresh baseline
- Payment not processed, blocking the check from executing

## How this service works

Change watch for is perplexity ai 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 perplexity.ai, a boolean 'changed' flag indicating whether the result differs from the previous call, a list of fields that changed with their before and after values, and the timestamp of when the status was last seen. Previous results are stored for 90 days per query.

## 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/perplexity-ai-uptime-change-watch-2066e293/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)