OpenVibe.Watch: persistent user-defined observations and conditions over pages, feeds, APIs, webhooks and OpenVibe events.
A watch states what it observes (source), how often or what pushes to it (cadence / event pattern),
what value it takes (extraction), how that value is compared and when the condition fires, and what
it wakes. A watch never polls when an event or a webhook will do, and it never fabricates a value:
a check that failed is recorded as failed, and an absent value stays absent.

Pages (HTML, server-rendered): /, /watches, /how-it-works, /updates. Sign in at /auth/login.
This text index is what a non-browser client gets here.

GET  /api/v1/watches, /api/v1/watches/:id                                      (watch.watch.read)
POST/PATCH/DELETE /api/v1/watches[/:id], POST /api/v1/watches/:id/pause, /resume (watch.watch.manage)
GET  /api/v1/watches/:id/observations, /api/v1/watches/:id/checks               (watch.observation.read)
POST /api/v1/watches/:id/check                                                 (watch.check.run)
GET  /api/health, /api/ready, /release.json

Source: https://github.com/OpenVibers/OpenVibe.Watch