@grzegorz.zajac Thanks for your question - so this guide and this guide can explain how you can use the DSS REST API using Postman - which will provide a similar experience to swagger. Basically you can download a set of Postman Tutorials from the downloads tab. You will then need to provide your DSS credentials in Postman as per the guides I provided.

I hope this can help.

@jason.ramchandani01 Thanks for getting back to me.

I have shown the documentation on the Developer Portal and the REST API Help including the tutorials you mentioned to the client. They will be using those, but the question is if we have OpenAPI/Swagger documentation as well? The programmers mentioned particular standardized file formats (unfortunately I didn't note the format down, but it was not .xml as we have here), which they would upload into their tools and build the queries semi-automatically.