The API request rate limit applies to the public InControl API service only. For ICA, no rate limit is applied.
Even though there is no rate limit on ICA, making a high rate of API calls is usually not necessary. Making a lot of API requests is usually because our users wanted to collect many devices’ status information. They thought they have to make an API call for each device one-by-one. But actually, it is not needed. The system provides many group-level API endpoints. You usually could collect the needed information of all devices in a group with just one group-level API call.