Anyone worked with the Kayako API before?

I'm trying to upload files to the Kayako REST API, as detailed here:

https://developer.kayako.com/api/v1/reference/file_upload/#single-step-uploading-2

Curl Options Used:
-X POST -H "X-CSRF-Token: <<my_token_here>>" -H "Content-Type: application/octet-stream" -H "X-Session-ID: <<my_session_id_here>>" -D $header_dump -d @$upload -b @$cookie -c @$cookie_jar

Where $upload is a variable set to the file to be uploaded (using set variable step)

CURL operation seems to run fine, but in the results, there's no 'content' listed, and indeed, the files which are displayed in Kayako are invalid (they have no content):

{
"status": 201,
"data": {
    "id": 491780,
    "name": "image.png",
    "size": 902023,
    "content_type": "application/octet-stream",
    "content_url": "https://stickershop.kayako.com/api/v1/files/491780/content",
    "created_at": "2020-04-23T18:54:29+00:00",
    "expiry_at": "2020-04-24T06:54:29+00:00",
    "resource_type": "file",
    "resource_url": "https://stickershop.kayako.com/api/v1/files/491780"
},
"resource": "file"

}

Any ideas? Am I declaring the variable to be sent wrongly?

Does it work with POSTMAN?

Have you contacted the company for tech support?

Nope, just tried it in Postman, didn't work either, so I've escalated it to their tech support...

Yep, that's the right way to go.

Good luck.