Problems Accessing External REST API

I'm still sort of new to .NET and .NET CORE, and think I need a nudge in the right direction on something...

My .NET Core web application needs to communicate with an external REST API and grab some data. Now, I can successfully authenticate and get back limited data. The problem is that I can't figure out how to grab ALL the data I need. I'm trying to access the ClearPass Policy Manager Configuration API and grab a list of all the devices in the system. But it seems to have a limit of 1,000 records. How do I go about paging or something in order to grab the 2,000+ entries from the API?

Here's an example of what I've currently got (limited to 999).

using (var httpClient = new HttpClient())
{
	httpClient.BaseAddress = new Uri(baseUrl);
	httpClient.DefaultRequestHeaders.Accept.Clear();
	httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
	httpClient.DefaultRequestHeaders.Add("Authorization", "Bearer " + accessToken);
	//HttpResponseMessage response = await httpClient.GetAsync("api/device");
	HttpResponseMessage response = await httpClient.GetAsync("api/device?filter=%7B%7D&sort=-id&offset=0&limit=999&calculate_count=false");
	if (response.IsSuccessStatusCode)
	{
		//do my stuff
	}
}

Thanks!