If you're using the services to retrieve the campaign details, you can use the
CampaignService. If you're using the API reports, you will be able to retrieve the experiment reports like the usual campaign reports using the
Campaign Performance Report. The
baseCampaignId field on campaigns represents the base campaign. The
campaignTrialType field is used to distinguish between the regular and trial campaigns. For normal campaigns, the campaignTrialType is set to BASE. For draft and trial campaigns, the campaignTrialType is set to DRAFT and TRIAL respectively. You will be able to use the same fields for both services and report types. Please refer to the documentation here for
services and
reports. I should also mention that since the draft campaigns don't serve ads, they will not appear in the reports,
even if you specifically request them or set includeZeroImpressions to true.