Integrating Third party application in Hubspot



We want to integrate a third party application in Hubspot. Below are some questions related to same.

  1. Does HubSpot support adding an iframe on its standard/custom forms . If yes then how below points [#a, #b] are achieved?
    a. Can we pass the context of the current user which includes user id, user name something to identify the organization, Server URL etc.
    b. Can we pass the context of the currently loaded entity - Contact/Lead/Account/Opportunity so that we can read and write data using the hubspot API set.

  2. Is there a standard way of delivering this Iframe to the Hubspot customers? If yes, what are the options.

  3. Can we create a shortcut/new menu item to make it easy for users to reach such iframes.