The Spark Browser let's your query a Spark Core for it's available variables and functions. You can then read the variables and execute the functions passing along any params the function needs. For any variable, you can create a schedule to start logging the values.
You can skip manually entering IDs by creating an account. You'll then be able to browse all of your Spark devices.
Enter your access token and device's device Id. These are NOT saved or logged anywhere.