# Blackboard.com Downtime Change Watch

> Blackboard.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 blackboard.com availability and returns whether its status has changed since your last check, with before/after field diffs.

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/blackboard-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/blackboard-com-downtime-change-watch-5ed73db5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_P2Tb9U6hY9NrFvcr0mD5m

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 blackboard-com-downtime-change-watch-5ed73db5
```

Example prompt: Keep an eye on blackboard.com for me and let me know if its availability status changes — I want to be alerted the moment it goes down or comes back up.

## When to prefer this

Use this endpoint when you need change-detection semantics — not just a point-in-time status, but whether blackboard.com's availability has shifted since your last poll. Ideal for scheduling periodic checks and triggering alerts only on state transitions, reducing noise from repeated identical results. Prefer over a plain is-down check when you want diff output (before/after field values) and idempotency-aware alerting.

## Known failure modes

- No previous check stored (first call returns no diff, only current state)
- blackboard.com unreachable due to network issues unrelated to site downtime
- Stored previous result expired after 90 days, resetting comparison baseline
- Payment failure prevents check from running ($0.02 USDC required per call)
- Edge check may not reflect regional outages affecting only specific geographies

## How this service works

Change watch for is blackboard 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 blackboard.com, a boolean 'changed' field indicating whether the result differs from the previous call (stored for 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/blackboard-com-downtime-change-watch-5ed73db5/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)