# Fastmail Downtime Change Watch

> Fastmail 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 fastmail.com is down and returns whether the status has changed since the last check, with before/after field diffs

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/fastmail-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/fastmail-downtime-change-watch-10762b18
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bsV1-TsB_WYvAZNZkmJM6

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 fastmail-downtime-change-watch-10762b18
```

Example prompt: Keep an eye on fastmail.com for me — let me know if its status has changed since the last time you checked, and show me what specifically changed.

## When to prefer this

Choose this endpoint when you need change-detection semantics — not just a raw current status, but a structured diff showing whether fastmail.com's availability has changed since your last poll. Ideal for scheduling periodic checks to trigger alerts only on transitions (up→down or down→up), rather than re-processing the same status repeatedly.

## Known failure modes

- No previous check stored (first call returns no diff data)
- Fastmail.com unreachable due to transient network issues unrelated to actual outage
- Stale comparison if 90-day retention window has expired
- Rate limiting or payment failure at $0.02 per check

## How this service works

Change watch for is fastmail 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 fastmail.com, a boolean 'changed' flag indicating whether the status differs from the previous call, a diff of which fields changed with before and after values, and the timestamp of when the status was last seen. Previous check results are retained 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/fastmail-downtime-change-watch-10762b18/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)