# 633Pulse

> 633Pulse is the Monitor layer of the 633 Labs platform: server and website monitoring with agents and real-time alerts.

## API for AI agents

- OpenAPI: https://pulse.633labs.com/api/openapi.yaml
- API catalog: https://pulse.633labs.com/.well-known/api-catalog
- Health: https://pulse.633labs.com/api/health

## Authentication

| Method | Use case |
|--------|----------|
| `X-API-Key: lsk_...` | Query servers, sites, incidents (paid plan) |
| User JWT | Full management including API key creation |
| Agent HMAC | `POST /api/metrics/ingest` from Go agent |

## Webhook events (outgoing)

- `alert.fired`, `alert.resolved`
- Configure via `POST /api/webhooks` with event filter

Verify `X-633Pulse-Signature: sha256=<hmac>`.

## Key endpoints

- `GET /api/servers`, `POST /api/servers` — monitor hosts
- `GET /api/sites` — HTTP/SSL uptime checks
- `GET /api/incidents` — active and historical incidents
- `GET /api/webhooks/deliveries` — webhook delivery log

## Why Pulse

Comparison with UptimeRobot, Better Stack, and Pingdom: https://pulse.633labs.com/why-pulse

## Related products

Part of [633 Labs](https://633labs.com): 633Page, 633Ops, 633Logs.