Java Web API - what technologies/tools/tools to use?

Question

Java

Hello, such a task: there is a php application and an rsa server for two-factor authorization. Between them is a java-proxy server, which is an intermediary, in other words, it must provide a web api interface for a php application. The command set is small.
Actually the question is: what technology (framework / library / tools) to choose to build this WEB API in java?

Answer 1

Some implementation of JAX-RS. Or you can process requests manually if the API is small - save server resources.