Although current service discovery protocols provide the same basic function of service discovery, they differ significantly in architecture, message exchange pattern, expected operating environment and service representation/description. These differences prevent service interoperability among protocols. To solve this problem, we propose a web-based integrated service discovery mechanism, using an agent platform to guarantee scalability of scope of available services without modifying existing service discovery protocols. The proposed web-based integrated service discovery mechanism provides users with a wider selection of services, and convenient search methods.