1. A method in a computing system for tracking context of a service provider by an interceptor of requests from a client to the service provider, the method comprising: modifying a portion of service provider context information to reference interceptor context information associated with the client and retaining content of the portion before modification; providing the modified service provider context information to the client; and upon receiving from the client a request for a service of the service provider, the request including the modified service provider context information, using the modified portion of the service provider context information to retrieve interceptor context information; restoring the modified portion of the service provider context information with the retained content; and forwarding the request to the service provider, the forwarded request including the restored service provider context information.