I need to gate content on my website (external server to hubspot). To do this I would like to be able to query one of the lists on my hubspot account to see if the specific user machine trying to access my site is on that list and then react accordingly. I am at a complete loss as how to do that but surely it should be doable as after all gating content according to membership of a list is an obvious use of the hubspot subcription list. Any ideas out there as to how to do this gratefully received.
Method tried so far is to use a contextual marketing page on hubspot info.innerdrive.co.uk/subscriber to generate a page that decides if a user is SUBSCRIBED or NOTSUBSCRIBED, but when I try to parse that page from here https://www.innerdrive.co.uk/SubscriberPageTest.php the original page does not then recognise the users cookies and so returns NOTSUBSCRIBED the whole time. So frustrating