Both addresses are correct and can be used interchangeably.
However, we strongly recommend to use portsdb-jsrv.rhcloud.com via https for API
integration purposes due to security considerations. See documentation for more details
Ports data is collected from open sources available on the WEB,
mostly from ports' official websites. The data is gathered and reviewed by community
of enthusiasts connected with maritime shipping and nautical navigation. In future
to extend our community by providing corresponding web-tools allowing everyone
interested to participate in the project.