The Odyssee API is usable via port HTTPS (443) with SSL encryption. It means all communication between client and the server is secure.
Be aware the SSL is not required (easier to debug during the development when messages are not encrypted) but is highly recommended.
Not all users of a domain can connect to the API. It means your services/sales users will not be able to extract/introduice data on your database.
The supervisor of the domain can allow a user to connect to the API via the Portal (field Allow throught API).
By default, a user is not allowed.