Attachment (00P...) or a ContentDocument (069...). Like the Opportunity file download, this does not stream the file: the response body is { "url": "..." }, which the client must fetch separately.authorization: ********************curl --location 'https://qa-api.kiolinkapp.com/v1/xc/salesforce/requests//attachments/' \
--header 'authorization: <api-key>'{
"url": "https://kio--full.sandbox.my.salesforce.com/servlet/servlet.FileDownload?file=00PQL00000RYgK72AL&operationContext=S1"
}