Shopify integration with Delphi

Question

I am trying to use the Shopify GraphQL Admin API from Delphi. Came up with the following code:

procedure TestShopify;
var
  Client: TRESTClient;
  Request: TRESTRequest;
  Response: TRESTResponse;
  QueryJSON: string;
begin
  Client := TRESTClient.Create('https://<my shop>.myshopify.com/admin/api/2025-10/graphql.json');

  Request := TRESTRequest.Create(nil);

  Response := TRESTResponse.Create(nil);
  try
    Request.Client := Client;
    Request.Response := Response;
    Request.Method := rmPOST;

    Request.Params.Clear;
    Request.AddParameter('X-Shopify-Access-Token', '<app token from shopify>', pkHTTPHEADER);
    Request.AddParameter('Accept', 'application/json', pkHTTPHEADER);
    Request.AddParameter('Content-Type', 'application/json', pkHTTPHEADER);

    QueryJSON := '{"query": "{ shop { name myshopifyDomain } }"}';
    Request.Body.ClearBody;
    Request.AddBody(QueryJSON, ctNone);

    Request.Execute;
  finally
    Response.Free;
    Request.Free;
    Client.Free;
  end;
end;

Did try "different flavours" of the above code and the best I got was this error:

Project TestShopify.exe raised exception class EHTTPProtocolException with message 'HTTP/1.1 406 Not Acceptable'.

Note: I did try the above request with Postman from my computer and I get back the expected result.

Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. — Community
– Community Bot, Commented Nov 13 at 9:30
{"query": "{ shop { name myshopifyDomain } }"} is invalid JSON all along, it must be at least name: "myDomain". Sure you posted exactly the same with Postman? — AmigoJack
– AmigoJack, Commented Nov 13 at 12:12
And instead of ctNONE you might want to pass ctAPPLICATION_JSON. — AmigoJack
– AmigoJack, Commented Nov 13 at 12:19
Based on exception raised the handshake is refused by Shopify since you are connection using HTTP protocol. If you read TRESTClient documentation you can find next notice:: Important: To access REST APIs using the HTTPS protocol, you should download OpenSSL libraries provided by the Indy project. So you will have to use Indy based rest client to work over HTTPS protocol. — SilverWarior
– SilverWarior, Commented Nov 13 at 13:00
@AmigoJack the query shown is valid JSON. It is just a name/value pair where the value is a string. The syntax of that string is not JSON. shopify.dev/docs/api/usage/search-syntax — Remy Lebeau
– Remy Lebeau, Commented Nov 13 at 17:09

Stijn Sanders · Accepted Answer · 2025-11-16 19:45:25Z

1

I've been using WinHttp do perform HTTP calls to Shopify:

procedure TForm1.Button1Click(Sender: TObject);
var
  r:IWinHttpRequest;
begin
  r:=CoWinHttpRequest.Create;
  r.Open('POST','https://'+MyShopName+'.myshopify.com/admin/api/2025-10/graphql.json',false);
  r.SetRequestHeader('X-Shopify-Access-Token',MyShopAccessToken);
  r.SetRequestHeader('Accept','application/json');
  r.SetRequestHeader('Content-Type','application/json');
  r.Send('{"query":"orders(first:100){edges{node{id name}}}"}');

  Button1.Caption:=IntToStr(r.Status);//check 200
  Memo1.Text:=r.ResponseText;
end;

edited Nov 16 at 19:45

answered Nov 14 at 20:53

Stijn Sanders

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1 Comment

Benjamin Keresztes Nov 17 at 9:31

Thanks, I will give it a try. Was hoping to use the TRESTClient like I did it with so many other APIs

Adriaan · Accepted Answer · 2025-11-15 05:16:03Z

-1

You should be setting the content type when setting the body. At the moment you are setting it to ctNone.

Request.AddBody(QueryJSON, ctAPPLICATION_JSON);

EDIT: I have not tested this but based on some posts i read on the shopify forums 406 is thrown when shopify doesnt understand the content you sent it. This made me check how you are sending the body which made me see that you are not defining the content type. TRestRequest will send the content type you defined with the body. You are setting this to ctNone.

edited Nov 15 at 5:16

answered Nov 15 at 5:09

Adriaan

8148 silver badges27 bronze badges

2 Comments

AmigoJack Nov 15 at 13:21

I commented that already.

Benjamin Keresztes Nov 17 at 9:27

This change doesn't work. The reason of sending ctNone is the following: - ctNone tells Delphi not to append a charset to the Content-Type. - The JSON body is provided as a raw string, which Shopify prefers.

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