A method for an agent service applied to a Widget is provided, where the method includes: receiving a service request for the Widget using an Application Programming Interface (API) initiated by a user terminal; forwarding the service request to an API service provider, and forwarding a response for the service request from the API service provider to the user terminal; collecting charging information generated by the Widget using an API service, and recording the collected charging information, where the charging information, together with a charging policy registered by the Widget, is used to perform uniform charging for the API service used by the Widget. An embodiment of the present invention further provides a server, which may reduce complicated user operation and bringing better user experience.