I am following the use case guide for SP feeds.

I am able to create a document and upload XML to it without problems.

However I am unable to use the createFeed (POST /feeds/2021-06-30/feeds) endpoint. I am sending what should be a valid body, and I have proper header, but I am still getting 403. Any help what am I doing wrong or which permissions am I missing?

curl --location 'https://sellingpartnerapi-eu.amazon.com/feeds/2021-06-30/feeds' \

--header 'x-amz-access-token: (token which worked to create document)' \

--header 'Content-Type: application/json' \

--data '{

"feedType": "POST_ORDER_ACKNOWLEDGEMENT_DATA",

"marketplaceIds": [ "A1PA6795UKMFR9" ],

"inputFeedDocumentId": "{feed I got from createDocument}"

}'

And the error message I get is not super helpful:

{

code: 'Unauthorized',

message: 'Access to the resource is forbidden',

details: ''

}