Image , PDF Sharing Via HTTP API

Hi, using http API We had Fetched the PDF or Image Url and stored in custom field , but currently there is no option to send that received image or pdf in its format, only able to pass the url , but it not make any sense, so for temporary solution , we used to create a template message and triggered that after receiving the http api data But now the issue is WhatsApp Had Changed their Pricing to Per message based, so even if the user is inside 24hrs if we send marketing message we need to pay for that So in the past 4 Days Our Meta Charges is 60% Increased due to this which leads us to stop that automation flow temporarily stop Kindly consider and provide a custom field url mapping in image , document nodes on drag and drop builder Thank you