# npmjs.com Downtime Change Watch

> npmjs.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 npmjs.com is down, returning the current status and whether it has changed since the last check (with before/after diff).

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/npmjs-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/npmjs-com-downtime-change-watch-2772d7c7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5qg1PR40wzYC1lR8O-0Dq

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 npmjs-com-downtime-change-watch-2772d7c7
```

Example prompt: Check if npmjs.com is down right now and tell me whether its status has changed since the last time we checked — I want to know what specifically changed and when it was last seen.

## When to prefer this

Use this endpoint when you need differential/change-aware monitoring of npmjs.com availability rather than a simple one-shot status check — particularly useful for scheduled polling workflows where you want to be alerted only when something changes, avoiding alert fatigue from repeated identical statuses. Prefer over plain uptime checks when you need the before/after diff and a 'changed' boolean to gate downstream actions.

## Known failure modes

- No previous result stored (first call or data expired after 90 days) — 'changed' may be null or undefined
- npmjs.com check itself times out or is unreachable — returns error or indeterminate status
- Payment failure (x402 protocol) — request rejected before check is run
- Stale comparison if caller does not schedule regular polls — changed flag will miss intermediate transitions

## How this service works

Change watch for is npmjs 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 answer for npmjs.com, a boolean 'changed' flag indicating whether the status differs from the previous call (stored for 90 days), an object listing each field that changed with its before and after values, and a 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/npmjs-com-downtime-change-watch-2772d7c7/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)