Parameter	Mandatory	Description	Examples	More Info
API	Yes	The API area	attachments.json
General	Yes	Parameters described in overview	user=user&password=user	Structure of an API call
Action	Yes	The action to perform	action=attachmentview
Identifier	Yes	Attachment ID or UUID	attachment=5471

If the attachment is stored in S3 (cloud) it has to download from AWS to the 4D Server and converted into base64.

Example request:

http://&lt;SERVER&gt;/jsonapi/attachments.json?&user=user&password=user&version=4&company=1&attachment=5471&action=attachmentview

Example response:

{
  "responsecode": 1,
  "responsestatus": "OK",
  "errorcode": 0,
  "errormessage": "",
  "totalrows": 1,
  "totalpages": 1,
  "responsemessage": "",
  "pagerows": 0,
  "pagenumber": 1,
  "success": true,
  "data": [
    {
      "attachmentUuid": "E4A7C32FC8A5D849BED41CDA8256DBF2",
      "attachmentTimestampModified": 1501773244,
      "attachmentRecordVersionNumber": 1,
      "attachmentOriginalFilename": "tmp.csv",
      "attachmentBase64": "SEVSRSBJUyBTT01FIFRFWFQNCg==",
      "attachmentContentDisposition": "attachment; filename=\"tmp.csv\"",
      "attachmentContentType": "application/csv"
    }
  ]
}