# PingWhen

> Watch a URL. Get pinged when it changes or dies. Alerts go to email, SMS (US/CA), or a signed HTTPS webhook. Paid plans only: Starter $9/mo (10 watches, every 15 min), Plus $19/mo (40 watches, every 5 min). Agents pay the same Stripe subscription as humans.

We watch the HTML we receive (visible text, hashed); JavaScript-only pages are not supported. Create a watch with POST /v1/watches; the response includes a Stripe checkout_url for a human (or authorized agent) to pay. Poll until status=active.

## Docs

- Docs: https://pingwhen.app/for-agents
- API: https://pingwhen.app/v1/watches
- OpenAPI: https://pingwhen.app/v1/openapi.json
- Humans: https://pingwhen.app/

## Optional

- [Website change alert](https://pingwhen.app/website-change-alert)
- [Uptime email alert](https://pingwhen.app/uptime-email-alert)
- [Bot / fetch policy](https://pingwhen.app/bot)