Abstract: An exemplary network node provides at least one Internet service that is executed in at least one provider server of a service provider for users of an Internet marketplace. The exemplary node comprises at least one outer connector for receiving a service request whose generation can be initiated in a user computer of an Internet marketplace user and for transmitting to the user computer a processing result ascertained in the provider server, the Internet service being requested on a website of the Internet marketplace that is provided by a marketplace server connected to the user computer, the outer connector being adapted to make a format change to the service request and to the processing result, as an adaptation to the Internet marketplace.