Hi Martin,
Thank you for reaching out. Yes this is possible in the API. For AdWords API, you can use DataService to retrieve recommendations as shown here. For Google Ads API, you can use domain_category in a similar fashion.
Regards,
Anthony
Google Ads API Team
Hi Duong,
As explained here, DataService can be filtered on domains OR campaigns so you do not need to specify any campaign in your Selector. See here for the list of fields that can be filtered on.
Regards,
Anthony
Google Ads API Team