[Sage X3 On Premise endpoint Graphql]

Hi everyone, I'm getting troubles with accesing Graphql services with a On-Premise SAGE X3 v12 instance for a client. 

I was able to request Webservices with below endpoint, where PROD is my folder

{{server}}/api1/x3/erp/PROD/SORDER?representation=SORDER.$query&OrderBy=ORDDAT desc, 

Also  SOAP Services with below endpoint

/soap-generic/syracuse/collaboration/syracuse/CAdxWebServiceXmlCC

But I'm not able to request or find out which endpoint to use for graphql services,

I tried in a form like:

{{server}}/v1/service/PROD/api/  

with Basic Auth, it return Status Code 200, but I get this response in blank

 

I hope someone can help me with this.

 

Thanks and regards