Listing monitored websites via SDK

5 minutes ago, systemgeek said:

print(len(api_response.items)) returns 132 which just looking at the data seems right.

Ok, that jives. With size=1000 (which is the max, your 5000 size is getting capped at 1000) and offset=0, you are requesting 1000 items starting with the 0th item, which gets you all 132 websites. Group membership doesn't play into what is coming back and what isn't. Group membership is indicated in the results, but it doesn't drive what is returned by the API.