# Craigslist.org Uptime Change Watch

> Craigslist.org 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 craigslist.org is down and returns a change-detected result comparing the current check against the previous call, including before/after field diffs and last-seen timestamp.

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/craigslist-org?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/craigslist-org-uptime-change-watch-1b07c3d8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p_RPaDcQbOJ9SF0krIbc1

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 craigslist-org-uptime-change-watch-1b07c3d8
```

Example prompt: Keep an eye on craigslist.org for me — check if it's up or down and let me know if that status has changed since the last time you checked.

## When to prefer this

Choose this endpoint when you need change detection rather than just a point-in-time status check — specifically when you want to know if craigslist.org's availability has shifted since your last poll. Ideal for scheduled agent workflows that need to fire alerts only on state transitions, not on every check. Prefer over a raw is-down endpoint when you need diff data (before/after field values) and last-seen timestamps for incident tracking.

## Known failure modes

- No previous result stored (first-ever call for this query): 'changed' may be null or unavailable, only current status returned
- Craigslist.org unreachable due to network issues unrelated to site health: may falsely report outage
- Previous result expired (older than 90 days): comparison baseline lost, treated as first call
- Payment failure via x402 protocol: call rejected before check runs
- Cloudflare or CDN masking actual origin status: HTTP 200 returned even if origin is down

## How this service works

Change watch for is craigslist org 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 craigslist.org, a boolean 'changed' flag indicating whether the result differs from the previous call (stored for 90 days), a list of fields that changed with before/after values, and a last-seen timestamp. Costs $0.02 USDC per call.

## 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/craigslist-org-uptime-change-watch-1b07c3d8/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)