Anyone working with quotes from Deutsche Börse & CME?

[Nicole]

Here is something which sounds too good to be true (a bad sign, I know):
https://console.developer.deutsche-boerse.com/

A free API for getting quotes from half Europe and the CME. In other words, the most important quotes of the world, for free. The quotes can be addressed by a language,  similar to SQL.

The only disadvantage: It does not work for me.

Yes, I have an API-key but am not sure, how to put it into the url.

What I usually work with is this below (the response is not json here)
The url of the documenation how I read it does not even give a positive response, if I key it into the browser. I am clueless.

Code: Pascal  [Select][+][-]

1. // Input: url mit Datenanbieter und korrektem Anforderungslink, Ooutput: json-String
2. function TAktienkurse_holen.GetUrlJsonResponse(Url: string): string;
3. var
4.   HttpClient: TFPHTTPClient;
5.   Json_Response: string;
6.   Json_Obj: TJSONObject;
7.  
8. begin
9.   HttpClient := TFPHTTPClient.Create(nil);
10.  
11.     // Sende die Anfrage und erhalte die Antwort als String
12.     Json_Response := HttpClient.Get(Url);
13.  
14.     // Prüfen, ob die Antwort im JSON-Format vorliegt
15.     Json_Obj := TJSONObject(GetJSON(Json_Response));
16.  
17.     // Wenn das Parsen erfolgreich war, gebe die Antwort im JSON-Format zurück
18.     Result := Json_Obj.FormatJSON;
19.  
20.  
21.     HttpClient.Free;  // Stelle sicher, dass das Objekt freigegeben wird
22.  
23. end;

[dseligo]

Yes, I have an API-key but am not sure, how to put it into the url.

It says (here: https://docs.developer.deutsche-boerse.com/docs/consumer/getting-started/consume) that:
To call an API, pass the API key as an HTTP header named: X-DBP-APIKEY

So, try following:

Code: Pascal  [Select][+][-]

1. ...
2. const APIKey = 'xxxxxxxxxxx';
3. ...
4.   HttpClient := TFPHTTPClient.Create(nil);
5.   HttpClient.AddHeader('X-DBP-APIKEY', APIKey);

You might also want to add couple of try..finally and try..except.

[Nicole]

Thank you for your quick reply. This looks great.
Please more slowly for somebody who has no idea of the matter.

What is a
"HttpClient.AddHeader"?

I know, how html is written, with head and body.
I know a little bit, how json works (in the meanwhile).
I know, what a url looks alike and a "&" etc. and there is a response in my browser.
Of APIs I have very little idea.

This "header" I cannot insert in the grid of my small knowledge.

[dseligo]

This is not the header of HTML document, this is the header of HTTP request.

https://en.wikipedia.org/wiki/List_of_HTTP_header_fields