# HuggingFace Down Change Watch

> HuggingFace Down 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 huggingface.co availability and returns whether the status has changed since the last check, including before/after field diffs and timestamp.

## Facts

- Endpoint: GET https://monitor.intel.rallylive.ca/watch/monitor/is-down/huggingface-co?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/huggingface-down-change-watch-1d74f787
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bNHPrqTRXqBd8BYgoYqrK

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 huggingface-down-change-watch-1d74f787
```

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

## When to prefer this

Choose this endpoint when you need change-detection semantics — not just the current status, but whether it has flipped since your last check. Ideal for scheduling periodic polls where you only want to act on transitions (up→down or down→up) rather than re-processing every stable result. Prefer the plain 'is-down' endpoint if you only need the current status without change comparison.

## Known failure modes

- No previous result stored (first call returns current status with changed=false or null baseline)
- HuggingFace check itself times out or is inconclusive
- Stored previous result expired after 90 days, resetting the comparison baseline
- Payment not processed, blocking the check ($0.02 USDC required per call)

## How this service works

Change watch for is huggingface co 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 huggingface.co, 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 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/huggingface-down-change-watch-1d74f787/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)