Can the source which makes hubspot rest api calls such as to submit forms, or create contacts, etc be from an http server, to production hubspot?
Or does production hubspot reject api calls if they do not come from an https domain?
As long as an https connection can be successfully made to HubSpot’s APIs, calls can come from just about anywhere. What you’ll also need to focus on is how HubSpot authenticates API calls.
I hope that proves helpful. Please let me know if you have any follow-up questions.