This paper describes the REAP toolkit, a reusable solution for enabling Remote Evaluation in Application-level Protocols. By using this toolkit, server developers can reduce the number of bytes sent/received and round-trip-times used by their protocols to fulfill a user task, making them more efficient in high latency, low bandwidth networks. This is accomplished by allowing the clients to upload simple mobile procedures to the server to be executed locally. This paper provides an overview of the REAP toolkit design and architecture, and gives experimental results showing significant reduction in the latency of two popularly-used application-level protocols.