# AgentReeve x402 Endpoint Watcher

> AgentReeve x402 Endpoint Watcher is a paid API for AI agents from agentreeve.com, paid per call via x402, $1/call, status down (last checked 2026-09-15).

Sets up 30-day buyer-side monitoring on any public x402 endpoint you don't own, alerting you via Discord webhook, email, or webhook when it goes down, recovers, has broken quotes, payTo drift, or price changes.

## Facts

- Endpoint: POST https://agentreeve.com/api/watch
- Price: $1/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentreeve-x402-endpoint-watcher-ec8b06e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_twx7mK46RzuCCh-pbEBNm

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 agentreeve-x402-endpoint-watcher-ec8b06e1 -d '<json body>'
```

Example prompt: Keep an eye on https://api.someservice.com/generate for the next 30 days and ping my Discord webhook at https://discord.com/api/webhooks/12345/abc if it goes down, the price changes, or the payTo address drifts.

## When to prefer this

Use this endpoint when you are a buyer or dependent of an x402 API you do NOT own and want proactive alerts about its availability, pricing integrity, or payTo address changes without needing to claim or manage the endpoint yourself. Prefer this over seller-side monitoring tools when you have no administrative access to the endpoint.

## Known failure modes

- Invalid or unreachable x402 endpoint URL — watch may not be created
- Invalid notification target (malformed Discord webhook, bad email) — alerts will fail to deliver
- Endpoint not an x402 service — probe may report constant failure
- Payment of $1 USDC not completed — watch not registered
- Watch expires after 30 days with no auto-renewal

## How this service works

Watch any x402 endpoint. Buyer-side alerts on an endpoint you DON'T own: down, recovered, broken quote, payTo drift, price changes — delivered to your Discord webhook, email or webhook for 30 days. No claim needed; it's public-behavior data.

## Output

Returns a confirmation that the watch has been registered for 30 days; thereafter the agent or user receives push notifications (via Discord webhook, email, or HTTP webhook) for events including: endpoint downtime, recovery, broken 402 quote, payTo address drift, and price changes — based on 60-second probe intervals.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentreeve-x402-endpoint-watcher-ec8b06e1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentreeve.com](https://www.zero.xyz/host/agentreeve.com/llms.txt)