Hello @Jonas Zanon Thank you for reaching out to us on Microsoft Q&A platform. Happy to help!
I see that you are using Cost Management API's to generate cost details and getting an error "Unsupported request. offer type: WebDirect for get detailed report request is not supported."
Your offer "MS-AZR-0003P" is a Pay-As-You-Go subscription. Note from doc - https://azure.microsoft.com/en-in/updates/cost-details-api/
"Pay-As-You-Go, MSDN and Visual Studio customers who are not a part of either an Enterprise Agreement or Microsoft Customer Agreement should continue using the Consumption Usage Details API"
Please use "Consumption Usage Details API" - https://learn.microsoft.com/en-us/rest/api/consumption/usage-details/list?view=rest-consumption-2023-05-01&tabs=HTTP to get required details.
Hope this answers your question. If you have any questions please write back to us!
If the response helped, do "Accept Answer" and up-vote it