iOS Companion App

The Hypothesis.sh iOS app is available on the App Store.

Push Notifications

The app receives push notifications via APNs. Webhook sessions can now send a push to a registered device when a request arrives — useful when you need to leave the browser open but want to be alerted on your phone.

The push test page lets you verify your device registration and trigger a test notification manually.

Vercel Deployment Webhooks

A new webhook endpoint accepts Vercel deployment events and forwards them as push notifications to a registered device. Point a Vercel project's deploy hook at /api/vercel-webhook/[deviceId] to get notified on deployment start, success, or failure.

Webhook Session Security

Webhook sessions are now locked to the device that created them — a second client can no longer take over an existing session. The session listing endpoint also requires authentication.