For the records and future maintenance, here are the urls where we got the wsdl files: PRODUCTION: ad_insight: https://adinsight.api.bingads.microsoft.com/Api/Advertiser/AdInsight/v12/AdInsightService.svc?singleWsdl bulk: https://bulk.api.bingads.microsoft.com/Api/Advertiser/CampaignManagement/v12/BulkService.svc?singleWsdl campaign_management: https://campaign.api.bingads.microsoft.com/Api/Advertiser/CampaignManagement/v12/CampaignManagementService.svc?singleWsdl customer_billing: https://clientcenter.api.bingads.microsoft.com/Api/Billing/v12/CustomerBillingService.svc?singleWsdl customer_management: https://clientcenter.api.bingads.microsoft.com/Api/CustomerManagement/v12/CustomerManagementService.svc?singleWsdl reporting: https://reporting.api.bingads.microsoft.com/Api/Advertiser/Reporting/v12/ReportingService.svc?singleWsdl SANDBOX: ad_insight: https://adinsight.api.sandbox.bingads.microsoft.com/Api/Advertiser/AdInsight/v12/AdInsightService.svc?singleWsdl bulk: https://bulk.api.sandbox.bingads.microsoft.com/Api/Advertiser/CampaignManagement/v12/BulkService.svc?singleWsdl campaign_management: https://campaign.api.sandbox.bingads.microsoft.com/Api/Advertiser/CampaignManagement/v12/CampaignManagementService.svc?singleWsdl customer_billing: https://clientcenter.api.sandbox.bingads.microsoft.com/Api/Billing/v12/CustomerBillingService.svc?singleWsdl customer_management: https://clientcenter.api.sandbox.bingads.microsoft.com/Api/CustomerManagement/v12/CustomerManagementService.svc?singleWsdl reporting: https://reporting.api.sandbox.bingads.microsoft.com/Api/Advertiser/Reporting/v12/ReportingService.svc?singleWsdl TEST: ad_insight: https://adinsight.api.bingads.microsoft.com/Api/Advertiser/AdInsight/v12/AdInsightService.svc?singleWsdl bulk: https://bulk.api.bingads.microsoft.com/Api/Advertiser/CampaignManagement/v12/BulkService.svc?singleWsdl campaign_management: https://campaign.api.bingads.microsoft.com/Api/Advertiser/CampaignManagement/v12/CampaignManagementService.svc?singleWsdl customer_billing: https://clientcenter.api.bingads.microsoft.com/Api/Billing/v12/CustomerBillingService.svc?singleWsdl customer_management: https://clientcenter.api.bingads.microsoft.com/Api/CustomerManagement/v12/CustomerManagementService.svc?singleWsdl reporting: https://reporting.api.bingads.microsoft.com/Api/Advertiser/Reporting/v12/ReportingService.svc?singleWsdl