The SDK doesn't send information to clients via webhook. It transmits data to ROOK server, which, in turn, communicates via webhook.
Diagram Flow
The extraction SDK requests health data from the device.
Processed data results in an event or a summary, depending on the request.
Data is transmitted to the ROOK server, processed, and then sent via webhook to the client.
Considerations:
The extraction process is client-defined; it can trigger when the application is open or prompt a push notification asking to open the app and send health data.