Recent advances in Web and mobile computing technologies provide users with a vast amount of information and services such as news, shopping, music, movies, and video games. These services can be provided with different qualities in terms of response time, price to pay, resource type (e.g. PDA or mobile phone), and audio and video reproduction quality. These factors must be considered in order to achieve an acceptable level of quality of the required services. However, currently there are no standard criteria to assess the quality of such services. In this paper, we propose novel agent-based criteria that include methods for assessing the quality of services and resources. These criteria, based on supply chain methods, enable agents to select and execute requests appropriately, depending on the quality of service and the underlying system?s capability. The proposed approach is generic and can be applied to different domains such as e-commerce, m-commerce, and multimedia applications.