POST api/cases/{caseId}/attachments

Add an attachment

Request Information

URI Parameters

Name	Description	Type	Additional information
caseId		globally unique identifier	Required

Body Parameters

None.

Response Information

Resource Description

CaseAttachment

Name	Type	Additional information
Id	globally unique identifier	None.
CaseId	globally unique identifier	None.
Timestamp	date	None.
Url	string	Required
Description	string	Required
MimeType	string	Required
UserId	globally unique identifier	None.
CaseAttachmentPermissions	Collection of CaseAttachmentPermission	None.

Response Formats

application/json, text/json

Sample:

{
  "Id": "34b66e00-950b-47c9-b09d-de723a8d6a4b",
  "CaseId": "fd7c416b-f732-463a-80a9-dc931831e9b2",
  "Timestamp": "2026-05-29T18:49:45.0425242+00:00",
  "Url": "sample string 4",
  "Description": "sample string 5",
  "MimeType": "sample string 6",
  "UserId": "4e6038f4-e879-4487-b7d7-86330b0faa4e",
  "CaseAttachmentPermissions": [
    {
      "Id": "54d2bdac-9135-4911-b077-390ad39ef0d2",
      "CaseAttachmentId": "6c976ce4-f32c-4a2d-bac1-505b7b348371",
      "OrganizationRoleId": "d63b84e3-862a-4ad4-8f4b-8de0cc696ab0",
      "UserId": "a403ab93-f7d4-48cf-aded-4ffbc0c71c97"
    },
    {
      "Id": "54d2bdac-9135-4911-b077-390ad39ef0d2",
      "CaseAttachmentId": "6c976ce4-f32c-4a2d-bac1-505b7b348371",
      "OrganizationRoleId": "d63b84e3-862a-4ad4-8f4b-8de0cc696ab0",
      "UserId": "a403ab93-f7d4-48cf-aded-4ffbc0c71c97"
    }
  ]
}

application/xml

Sample:

An exception has occurred while using the formatter 'XmlMediaTypeFormatter' to generate sample for media type 'application/xml'. Exception message: Object graph for type 'System.Collections.Generic.List`1[[DataModels.CaseAttachment, DataModels, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' contains cycles and cannot be serialized if reference tracking is disabled.

text/xml

Sample:

An exception has occurred while using the formatter 'XmlMediaTypeFormatter' to generate sample for media type 'text/xml'. Exception message: Object graph for type 'System.Collections.Generic.List`1[[DataModels.CaseAttachment, DataModels, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' contains cycles and cannot be serialized if reference tracking is disabled.