Hey, Terra sends data payloads as soon as they become available and are synced with the provider's cloud. For example, when a new activity is synced from your Fitbit to the Fitbit cloud, we receive a ping and we fetch, normalise and deliver the activity payload with minimal latency. For SDK based integrations i.e Apple and Samsung, the data will be instantly synced from our SDK with our API and transmitted to your webhook. With some providers like Oura, we poll the data with their API at 5min intervals - but you can always make a HTTP request with our REST API to get the data you need, on demand