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Attach File to an Issue 

POST /issue/{issue}/attachment 

Attach file to issue

POST /rest/issue/{issue}/attachment?{group}&{name}&{authorLogin}&{created}&{files}
Parameters:

Name

Type

Description

issue

issue id

Issue id to attach files to

group

string

Attachments visibility group

name

string

Preferred name for attach files

authorLogin

string

Attachment submitter login

created

instant

Attachment creation time

files

files

List of files to attach to an issue.

To define author and creation date 'Low-Level Administration' permission is required.

Files to attach are sent as request body using 'multipart/form-data' content type.

Sample 

Request
POST https://example.com/youtrack/rest/issue/CMN-1917/attachment?authorLogin=webster&created=1149678852000
Content-Length: 7839
Connection: keep-alive
Content-Type: multipart/form-data; boundary=---------------------------7d159c1302d0y0
Cookie: $Version=0; JSESSIONID=1eufd2pvosy59101uv1zr0bi1y; $Path=/; jetbrains.charisma.main.security.PRINCIPAL=NDgxMzQ5NGQxMzdlMTYzMWJiYTMwMWQ1YWNhYjZlN2JiN2FhNzRjZTExODVkNDU2NTY1ZWY1MWQ3Mzc2NzdiMjpyb290; $Path=/

-----------------------------7d159c1302d0y0
Content-Disposition: form-data; name="flag.png"; filename="flag.png"
Content-Type: image/png
Content-Transfer-Encoding: binary

<actual file content, not shown here>
-----------------------------7d159c1302d0y0--

Response
HTTP/1.1 201 Created
Content-Type: application/xml;charset=UTF-8
Location: https://example.com/youtrack/rest/issue/CMN-1917/attachment/_persistent/flag.png?file=45-50&v=0&c=true
Content-Length: 0
Last modified: 8 July 2019