Problem setting shipping information to a guest order through web API

[birk_olsen]

Hi

I am developing a webapp that will perform checkout using Magentos web api.

So far I am able to create a guest cart, add items to it, estimate shipping costs, but when I try to apply shipping-information to the order, I keep getting an error.

I post my address information and carrier-code and shipping method code to:

/rest/V1/guest-carts/Tmoy3t5NW70ORzYnDFCr4pFo2kgUQQdE/shipping-information

Here is the body I send to this endpoint:

{
  "addressInformation": {
    "**bleep**": "0776",
      "city": "Oslo",
      "email": "jens@nowaynorway.no",
      "firstname": "Jens",
      "lastname": "Hansen",
      "telephone": "12332122",
      "save_in_address_book": 0,
      "same_as_billing": 0
    }
  }, "shipping_carrier_code": "flatrate", "shipping_method_code": "flatrate"
};

The carrier code and shipping_method_code are both extracted from the result I get when calling the "estimate shipping costs" API endpoint.

I am not including region, region_id and region_code in my request, because it seems like Norway is not separated into regions.

It responds with a 404 error stating: 

message: "Carrier with such method not found: %1, %2","parameters":[null,null]

I am running magento CE 2.3.0 in a docker container on a macbook pro.

Guest checkouts using flatrate as shipping method works as expected in the magento storefront.

I have been stuck on this problem for a few days, any help would be greatly appreciated.

[magrumbo]

In case anyone finds this, the documentation is wrong.

Worked for me using lower camel case for the shipping details.

"shippingCarrierCode": "flatrate", "shippingMethodCode": "flatrate"

The clue was the addressInformation key at the top.

The random mix of camel case & snake case, lazy documentation and woeful error messages really makes you glad you picked magento!