A method of establishing an interconnection between trading networks may include receiving at a home operator of a home trading network an access establishment request communicated from a home user. The access establishment request may include a request to establish access to a desired application. The desired application may be associated with a foreign trading network coupled to the home trading network via a computer network. The method may further include communicating the access establishment request from the home operator to a foreign operator of the foreign trading network; receiving at the home operator an approval of the access establishment request communicated from the foreign operator, if appropriate; establishing an application access allowing the home user to use the desired application; and communicating a transaction communication to the desired application. The transaction communication may relate to a business transaction.