To be able to send requests to a third party you must create a service provider and a service routing.
Service Provider
For this feature you need a provider of type "External Information Search".
This provider is created by the development team.
Service Routing
•Select the External Information Search provider type
•Set the correct priority
•Leave the article blank
•In the Service Providers section select the Service Provider for your requests
•Click [Add] to add the provider to the routing
•Save the routing