Response format

How SP-API returns response headers and messages.

In response to an HTTP request, the Selling Partner API returns response headers and a JSON response message.

Response headers

Content-LengthStandard HTTP response header.
Content-TypeStandard HTTP response header.
DateStandard HTTP response header.
x-amzn-RequestIdRequest identifier. Include this if you contact us for support.

Success Response

If your request is successful, the Selling Partner API returns the data requested. Here is an example of a successful response:

HTTP/1.1 200 OK
Content-Length: 368
Content-Type: application/json
Date: Thu, 01 Jun 2020 22:23:31 GMT
x-amzn-RequestId: 6875f61f-6aa1-11e8-98c6-9bExample
  "payload": {
    "ConfirmedNeedByDate": "2020-04-23",
    "ConfirmedFulfillableDate": "2020-04-23"

Error response

If your request is unsuccessful, the Selling Partner API returns an error response. Here are the elements of the response message in an error response:

Response message

codeHTTP status code.Yes
messageExplanation of the error condition.Yes
detailsLink to additional information.No

Here is an example of an error response:

HTTP/1.1 400 Bad Request
Content-Length: 117
Content-Type: application/json
Date: Fri, 01 Jun 2020 21:48:02 GMT
x-amzn-ErrorType: ValidationException
x-amzn-RequestId: a8c8d99a-6ab5-11e8-b0f8-19363980175b
  "errors": [
      "message": "Access to requested resource is denied.",
      "code": "Unauthorized",
      "details": "Access token is missing in the request header."