Short answer
HubSpot's developer docs list GET /form-integrations/v1/submissions/forms/{form_guid} to get submissions for a form. For a one-off pull, exporting submissions from the forms list is simpler.
1. The call
GET https://api.hubapi.com/form-integrations/v1/submissions/forms/{form_guid}2. Or export
The forms list in my demo portal.
