We have a requirement where user will upload a Claim Details pdf in an application along with other details.  Upon submit, this information and attached pdf  is sent to an external Pega application .  A new Case is created in the externl app based on this request . 

Need help on how to  pass the uploaded pdf to the external application via Pega API v1 and attach it to the new case .  

We are using Pega CreateCase APIv1  (/cases POST) to create the case in the external app. But not able to pass the attachment through the attachments tag in the request body .