# Lumière PayCheck Watch

> Lumière PayCheck Watch is a paid API for AI agents from lumierepaycheck.org, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-11).

Registers a monitoring watch on an x402 endpoint so that a webhook receives alerts when price, wallet, or trust conditions change before an agent pays.

## Facts

- Endpoint: POST https://lumierepaycheck.org/v1/watch?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lumi-re-paycheck-watch-55cd45af
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fPmrdmYrfkBVnnx7FofCN

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 lumi-re-paycheck-watch-55cd45af -d '<json body>'
```

Example prompt: Set up a Lumière PayCheck watch on https://api.example.com/data so that my webhook at https://myapp.com/alerts gets notified if the price or payout wallet changes before I authorize any payment.

## When to prefer this

Choose this endpoint when an AI agent needs proactive, event-driven monitoring of an x402 payment endpoint — specifically to catch price drift, wallet swaps, or trust degradation before authorizing spend. Prefer it over a one-shot trust report when you want ongoing alerts rather than a single snapshot, and over generic uptime monitors when the signal you care about is payment-specific (price, payout wallet, x402 trust score).

## Known failure modes

- Invalid or unreachable x402 endpoint URL — returns error indicating the URL could not be validated
- Malformed or non-HTTPS webhook URL — rejected with a validation error
- Duplicate watch already registered for the same endpoint/webhook pair — may return conflict or existing watch
- Expired authentication or insufficient plan quota — returns authorization error
- Network timeout when probing the x402 endpoint during registration

## How this service works

Watch an x402 endpoint for 30 days: webhook alerts when it goes down, changes payout wallet, raises its price, or fails a paid delivery check.

## Output

Returns a watch object containing a unique watch ID (e.g. w_…), a secret webhook token to authenticate incoming alert POSTs, and an expiry timestamp indicating how long the watch is active.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "description": "x402 endpoint to watch"
  },
  "webhook": {
   "type": "string",
   "description": "https URL that receives alert POSTs"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "id": "w_…",
  "token": "keep-this-secret",
  "expiresAt": "…"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lumi-re-paycheck-watch-55cd45af/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from lumierepaycheck.org](https://www.zero.xyz/host/lumierepaycheck.org/llms.txt)