If you want to use the Woleet API for a given domain (eg. the “acme” domain, that would be accessible at https://acme.woleet.io/) you still have to use the base URL https://api.woleet.io/v1, but you need to specify the domain to use by adding a Domain header to your calls.
Domain: acme.woleet.io{code
Obviously, you need to authenticate using the credentials of one of the domain’s users.