Welcome to the developer area. Since we kept saying that Claudio is not for developers, why is there a Developer area? The answer is simple: at Greenvulcano we used this devoloper area to implement new services and test them. The initial plan was to remove this section, but at the end, since it was already there, we decided to leave it where it is, just in case one day you will need it. As long as the API service is in the reach of Claudio and you can describe it using the Open API format, Claudio will be able to integrate it.
To see what Swagger is, refer to Swagger