A collection of APIs of different night train providers.
An interactive SwaggerUI with API definitions can be found on GitHub Pages.
If you're using Google Chrome, it will block all requests from SwaggerUI by default. To circumvent this, you can create a new shortcut to Google Chrome and append the following parameters: --disable-web-security -user-data-dir=~ (note: single dash in front of user-data-dir). The directory for user-data-dir is not important, but it needs to exist on the local file system.
Warning
This will disable some security features of your browser. Use at your own risk.