I have an API script that is working on the Zoho CRM but am looking to port it to the vertical solution.

Couple of questions:

1. Documentation for the Vertical Solution seems to point to the v1.0 APIs. Should development for the Vertical Solution be using v1.0 or 2.0 APIs?

2. If 2.0, what scope be used for the generation of the key? I am assuming that this will allow us to access the vertical solution crm instance and not the crm.zoho.com instance?

3. With the vertical solution and with multiple customers, I am assuming that each customer will have their own api keys. Is this correct?

Thanks.