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JSON Simulator

We are announcing the launch of the JSON Simulator, a new tool in the ROOK portal designed to simplify and accelerate the validation of integrations with our API and SDK ecosystem.
The JSON Simulator allows teams to simulate, preview, and send real JSON payloads to their configured webhook, without the need for a physical wearable or data generated by end users. The tool integrates directly with the existing configuration of the ROOK portal.
JSON simulator
Previously, customers needed an active wearable and had to wait for data generation to validate their webhook. With the JSON Simulator, that bottleneck disappears.
The tool allows you to:
  • Send complete and consistent JSON payloads to the customer’s Data Webhook.
  • Preview data by health pillar, structure, and data source.
  • Test pipelines without relying on null values.
  • Generate a generic user_id that does not affect real data.
Key capabilities
  1. Automatic webhook verification: Before generating or sending data, the simulator checks whether the webhook is active to avoid errors or incomplete tests.
  2. Detailed data-source selection: Customers can choose the specific data source, health pillar, and data structure. Only compatible combinations are shown.
  3. Realistic and complete JSON generation: Generated JSON strictly follows ROOK’s Version 2 data structure and reflects the customer’s portal configuration.
  4. Direct webhook delivery: Allows end-to-end integration testing and provides immediate feedback.
  5. Simple flow, guaranteed speed: Generation and delivery take no more than 3 seconds per request.
Impact for customers
The JSON Simulator reduces integration times, removes dependency on wearables for testing, and improves understanding of how data varies across brands and structures. This enables teams to:
  • Train their product without physical devices.
  • Safely validate JSON and dashboards.
  • Ensure their webhooks work correctly before going live.
Availability
The JSON Simulator is available in the ROOK portal under the Tools module. Customers must have a configured webhook to use it; otherwise, they will be redirected to the configuration area.
FAQ
What is the JSON Simulator?
It is a tool in the ROOK portal that allows you to generate, preview, and send real JSON payloads to the customer’s Data Webhook, without physical wearables or real user data.
What is it for?
It speeds up and simplifies integration validation with ROOK’s APIs and SDKs. It enables full-flow testing without waiting for real data or relying on devices.
What problem does it solve?
Previously, customers needed an active wearable to validate webhook reception, which caused delays.
With the JSON Simulator, tests are immediate and fully controlled.
What type of data can I simulate?
You can simulate any JSON available in ROOK’s Version 2 data structure by selecting:
  • Compatible data source/brand
  • Health pillar
  • Structure (Summary, Activity, Heart Rate, etc.)
Are the JSON payloads real or test data?
They are real JSONs based on ROOK’s official structure, but they contain a generic user_id that does not affect your KPIs or real data.
Can I send the JSON directly to my webhook?
Yes. The tool allows you to:
  • Preview the JSON
  • Copy or download it
  • Send it directly to your configured webhook. You’ll always get immediate feedback indicating success or failure.
What happens if my webhook is not active?
The simulator automatically checks its status.
If it’s inactive, you won’t be able to generate or send JSON. The portal will guide you to activate it.
Which portal configurations affect the JSON?
The simulator respects your active settings, such as granularity and other applicable parameters.
Do the JSONs include null values?
You can generate fully populated JSON payloads without nulls—ideal for testing pipelines, dashboards, or transformations.
How long does it take?
Generation and delivery take less than 3 seconds per request.
What concrete benefits does my team get?
  • Faster validations
  • Less dependency on wearables
  • More reliable integrations
  • Better internal technical training
  • End-to-end tests in minutes
Where can I find the JSON Simulator?
In the ROOK portal under Tools → JSON Simulator.
Who can use it?
Any customer with a Webhook already configured in the portal.
If you don’t have one, the system will automatically redirect you to configure it.